Year Month Count Valid Min Max Mean Stdev Median 2007 01 553 489 16.28771 18.078871 17.367689 0.48149 17.460678 2007 02 553 489 15.042857 17.2465 16.302037 0.615315 16.390249 2007 03 553 489 18.421549 18.845322 18.64411 0.101581 18.637581 2007 04 553 489 19.999334 20.2152 20.089027 0.048851 20.0734 2007 05 553 489 24.082388 24.459936 24.269417 0.073285 24.259001 2007 06 553 489 27.378666 27.696133 27.569619 0.073586 27.575701 2007 07 553 489 29.42716 29.680161 29.566489 0.059148 29.572935 2007 08 553 489 30.308968 30.511936 30.41663 0.038617 30.417871 2007 09 553 489 28.928734 29.2075 29.060697 0.055717 29.062033 2007 10 553 489 25.547968 26.116806 25.924917 0.143618 25.948387 2007 11 553 489 20.301834 21.748266 21.22548 0.353956 21.306267 2007 12 553 489 18.84016 20.407097 19.825597 0.394956 19.91271 2008 01 553 489 16.237839 17.968193 17.327722 0.43098 17.428516 2008 02 553 489 16.114586 17.746897 17.103889 0.466942 17.205069 2008 03 553 489 17.603258 17.899065 17.742481 0.069511 17.738741 2008 04 553 489 20.790699 21.142267 20.942499 0.09608 20.909334 2008 05 553 489 24.188581 24.555065 24.368186 0.076917 24.359774 2008 06 553 489 28.799232 29.141399 29.037063 0.067919 29.054768 2008 07 553 489 29.014032 29.384451 29.245359 0.082636 29.255484 2008 08 553 489 28.288935 28.487162 28.37826 0.049668 28.374096 2008 09 553 489 27.8445 28.150234 27.991329 0.078957 27.984734 2008 10 553 489 24.159128 24.792419 24.525759 0.142184 24.541161 2008 11 553 489 19.453199 20.811434 20.272011 0.343155 20.336767 2008 12 553 489 17.133032 18.928968 18.187073 0.461351 18.264097 2009 01 553 489 15.943903 17.672161 16.950304 0.446381 17.050774 2009 02 553 489 14.717393 16.021572 15.501809 0.370602 15.613464 2009 03 553 489 18.034128 18.634418 18.391869 0.12898 18.410742 2009 04 553 489 20.350367 20.789833 20.621997 0.088541 20.648233 2009 05 553 489 24.764904 25.26413 25.013831 0.102642 24.995903 2009 06 553 489 27.351566 28.096966 27.791058 0.135977 27.824699 2009 07 553 489 28.276484 28.704613 28.540812 0.096145 28.547646 2009 08 553 489 29.281967 29.419128 29.347134 0.032003 29.344355 2009 09 553 489 28.227667 28.456301 28.354037 0.056976 28.356066 2009 10 553 489 26.126774 26.376484 26.277432 0.068328 26.301065 2009 11 553 489 20.6471 21.497366 21.207695 0.207781 21.284367 2009 12 553 489 17.309258 18.865677 18.235923 0.397806 18.301453 2010 01 553 489 14.330742 16.290451 15.403203 0.49631 15.465775 2010 02 553 489 13.285357 14.747 14.060323 0.36041 14.112785 2010 03 553 489 14.909904 15.494097 15.174771 0.154328 15.185387 2010 04 553 489 20.690901 20.992567 20.796925 0.06409 20.785534 2010 05 553 489 25.601452 26.343225 25.85099 0.192362 25.790258 2010 06 553 489 29.619699 30.120466 29.887741 0.095062 29.8978 2010 07 553 489 29.440968 29.702032 29.560294 0.058878 29.568773 2010 08 553 489 30.011194 30.306227 30.112291 0.079219 30.104 2010 09 553 489 29.02 29.222733 29.142633 0.046716 29.150034 2010 10 553 489 24.252775 24.798388 24.552915 0.106559 24.551033 2010 11 553 489 20.6665 21.230167 20.994056 0.138597 21.019766 2010 12 553 489 15.696033 16.675581 16.319951 0.232477 16.373323 2011 01 553 489 13.019677 15.477033 14.412855 0.62712 14.517677 2011 02 553 489 14.310429 15.955321 15.307168 0.469679 15.402322 2011 03 553 489 18.797291 19.093096 18.947125 0.061543 18.944065 2011 04 553 489 22.525656 22.978172 22.7476 0.087639 22.744896 2011 05 553 489 25.194517 25.527065 25.315167 0.068615 25.296259 2011 06 553 489 29.159733 29.644667 29.48758 0.116799 29.516567 2011 07 553 489 29.975193 30.209904 30.06874 0.039328 30.070097 2011 08 553 489 30.328968 30.652678 30.546922 0.073989 30.563129 2011 09 553 489 28.1707 28.381332 28.251854 0.044412 28.245234 2011 10 553 489 24.078386 24.553289 24.407058 0.087802 24.419096 2011 11 553 489 19.7988 20.838234 20.442947 0.271779 20.5319 2011 12 553 489 17.435162 19.360388 18.460836 0.488326 18.51 2012 01 553 489 16.237549 17.529419 17.033454 0.361654 17.107677 2012 02 553 489 16.448069 17.57 17.138088 0.283009 17.199966 2012 03 553 489 20.131128 20.417355 20.282271 0.071058 20.272871 2012 04 553 489 22.879601 23.202932 23.037787 0.058942 23.0424 2012 05 553 489 26.275097 26.638807 26.482012 0.075923 26.489 2012 06 553 489 27.275967 27.500834 27.393873 0.042124 27.398766 2012 07 553 489 29.063999 29.431032 29.230238 0.07067 29.229033 2012 08 553 489 28.884451 29.168451 29.034617 0.072622 29.026258 2012 09 553 489 28.0313 28.272333 28.151672 0.062256 28.160601 2012 10 553 489 25.417484 25.876259 25.670012 0.087689 25.668354 2012 11 553 489 19.5448 20.343533 20.025959 0.183106 20.0604 2012 12 553 489 17.840517 19.823 18.993019 0.537536 19.10771 2013 01 553 489 16.802839 18.547516 17.935192 0.480368 18.102322 2013 02 553 489 16.037285 17.326571 16.785707 0.346602 16.831499 2013 03 553 489 16.212 16.538967 16.392125 0.066397 16.387806 2013 04 553 489 20.4715 20.715366 20.566468 0.042768 20.567066 2013 05 553 489 23.46842 23.803741 23.597269 0.075979 23.591904 2013 06 553 489 28.202034 28.5672 28.402112 0.076019 28.3967 2013 07 553 489 28.228355 28.458872 28.293823 0.042383 28.292452 2013 08 553 489 29.308613 29.584129 29.453603 0.072399 29.436483 2013 09 553 489 28.712366 29.115433 28.882268 0.076868 28.889467 2013 10 553 489 25.426613 26.014225 25.793714 0.116931 25.802967 2013 11 553 489 20.736599 21.277933 21.068531 0.111678 21.081301 2013 12 553 489 17.624678 19.163485 18.513579 0.409384 18.584322 2014 01 553 489 14.899775 16.766743 16.133738 0.471273 16.261387 2014 02 553 489 14.98625 16.341785 15.703498 0.347562 15.729571 2014 03 553 489 16.665581 17.14587 16.891074 0.129242 16.877548 2014 04 553 489 20.106167 20.340733 20.211248 0.058565 20.204634 2014 05 553 489 24.605032 25.099838 24.824079 0.145464 24.806742 2014 06 553 489 28.064034 28.389166 28.270347 0.079496 28.285233 2014 07 553 489 28.526936 28.952709 28.78784 0.07755 28.789 2014 08 553 489 29.360291 29.741936 29.584952 0.087241 29.593033 2014 09 553 489 28.895767 29.248966 29.057955 0.088504 29.031467 2014 10 553 489 24.765322 25.244774 25.072371 0.129008 25.110645 2014 11 553 489 19.7938 20.506834 20.288942 0.153779 20.326799 2014 12 553 489 16.392742 19.059774 17.684641 0.612227 17.729839 2015 01 553 489 15.106613 17.579226 16.408415 0.598683 16.491678 2015 02 553 489 14.030714 15.755214 15.073685 0.444573 15.163107 2015 03 553 489 17.94087 18.395 18.153222 0.111382 18.136354 2015 04 553 489 22.5014 22.834066 22.587506 0.076075 22.5525 2015 05 553 489 26.134388 26.669968 26.342082 0.154215 26.331774 2015 06 553 489 29.2341 29.629999 29.416403 0.091529 29.415701 2015 07 553 489 29.157806 29.686064 29.416489 0.11269 29.419161 2015 08 553 489 29.892902 30.24629 30.104055 0.099176 30.127903 2015 09 553 489 28.055134 28.462299 28.279818 0.084368 28.284901 2015 10 553 489 24.184999 24.914614 24.598809 0.191247 24.656742 2015 11 553 489 22.5327 23.362833 23.049448 0.211807 23.1082 2015 12 553 489 19.568935 20.632677 20.205425 0.253511 20.277 2016 01 553 489 16.326162 18.444677 17.556192 0.504975 17.650129 2016 02 553 489 15.090655 16.084999 15.554825 0.235869 15.528207 2016 03 553 489 18.51071 18.816904 18.648362 0.068547 18.641548 2016 04 553 489 21.114334 21.668066 21.364042 0.140989 21.3267 2016 05 553 489 24.550451 25.293324 24.837159 0.136216 24.823807 2016 06 553 489 28.127733 28.877333 28.502062 0.1327 28.4939 2016 07 553 489 30.42671 30.649517 30.57263 0.051086 30.572258 2016 08 553 489 29.932032 30.258774 30.046905 0.065553 30.026356 2016 09 553 489 29.058033 29.247101 29.144651 0.042135 29.1443 2016 10 553 489 25.212517 25.516581 25.361906 0.06285 25.360838 2016 11 553 489 21.082767 22.111967 21.785838 0.246033 21.861334 2016 12 553 489 18.179838 19.324741 18.921484 0.269879 19.010323 2017 01 553 489 17.156677 18.746645 18.041452 0.373957 18.085194 2017 02 553 489 18.181536 18.499893 18.349661 0.066875 18.353928 2017 03 553 489 19.07942 19.495064 19.30619 0.102046 19.303226 2017 04 553 489 22.391201 23.000032 22.546754 0.156894 22.463133 2017 05 553 489 24.594419 24.984484 24.697713 0.095383 24.66629 2017 06 553 489 27.587366 28.079166 27.783393 0.125102 27.7658 2017 07 553 489 29.865967 30.076065 29.974767 0.070424 29.955709 2017 08 553 489 29.62871 30.045452 29.78567 0.104166 29.759323 2017 09 553 489 27.848801 28.2355 28.051119 0.119755 28.053366 2017 10 553 489 25.441322 25.84787 25.696027 0.083418 25.714323 2017 11 553 489 20.358566 21.454367 21.127855 0.260124 21.214733 2017 12 553 489 18.002678 19.967161 19.191608 0.521365 19.291903 2018 01 553 489 13.772 16.647451 15.515781 0.747573 15.648839 2018 02 553 489 16.898394 18.829107 17.938893 0.510561 17.976643 2018 03 553 489 18.498194 18.856356 18.652681 0.094087 18.624001 2018 04 553 489 20.753433 21.078733 20.904639 0.070038 20.896267 2018 05 553 489 25.175097 25.679291 25.347328 0.092233 25.335741 2018 06 553 489 28.514166 28.835867 28.723625 0.06982 28.737366 2018 07 553 489 29.765806 30.131001 29.965204 0.067427 29.968193 2018 08 553 489 29.381355 29.807581 29.593532 0.119924 29.56558 2018 09 553 489 29.630833 29.948967 29.749322 0.059022 29.740334 2018 10 553 489 26.828354 27.197807 26.967531 0.075868 26.964613 2018 11 553 489 20.873632 21.888134 21.607296 0.219497 21.677032 2018 12 553 489 16.353613 17.928709 17.203035 0.383804 17.208162 2019 01 553 489 15.593451 16.772451 16.276947 0.27056 16.308743 2019 02 553 489 16.134464 17.178249 16.654036 0.252091 16.673071 2019 03 553 489 17.651291 17.97971 17.802596 0.073618 17.811129 2019 04 553 489 20.9804 21.2003 21.054226 0.062887 21.040501 2019 05 553 489 26.059387 26.783581 26.261773 0.153244 26.193483 2019 06 553 489 28.712799 29.036568 28.925613 0.074663 28.939833 2019 07 553 489 29.667999 30.036097 29.82571 0.108358 29.773226 2019 08 553 489 29.808161 30.048485 29.918361 0.05883 29.907419 2019 09 553 489 29.308599 29.483366 29.409597 0.037485 29.403233 2019 10 553 489 26.50029 26.942677 26.776582 0.093498 26.797129 2019 11 553 489 20.300301 22.352266 21.654715 0.500037 21.787333 2019 12 553 489 16.940096 19.021999 18.296778 0.497076 18.40571 2020 01 553 489 15.777549 17.660225 16.859346 0.509963 16.928129 2020 02 553 489 15.450034 17.119553 16.424104 0.409917 16.49869 2020 03 553 489 20.165646 20.563129 20.389216 0.096066 20.395775 2020 04 553 489 22.332767 22.675566 22.478749 0.068964 22.4757 2020 05 553 489 24.369387 24.929129 24.577137 0.138774 24.544161 2020 06 553 489 28.318333 28.506001 28.428268 0.042842 28.432734 2020 07 553 489 29.392065 29.707483 29.601404 0.062791 29.604193 2020 08 553 489 29.917194 30.141806 29.99139 0.047594 29.985903 2020 09 553 489 28.089733 28.347134 28.222365 0.063971 28.2202 2020 10 553 489 25.275969 25.588646 25.431465 0.09242 25.443419 2020 11 553 489 21.746134 22.492167 22.21752 0.163207 22.243866 2020 12 553 489 16.453548 17.921484 17.434243 0.318951 17.519323 2021 01 553 489 14.473904 16.071968 15.412603 0.392524 15.447839 2021 02 553 489 14.467961 15.429231 14.940347 0.223267 14.918693 2021 03 553 489 18.299774 18.570065 18.391848 0.0727 18.363741 2021 04 553 489 20.601101 20.826067 20.697584 0.051908 20.687401 2021 05 553 489 24.372484 24.716162 24.50881 0.074367 24.498516 2021 06 553 489 27.722799 28.423866 28.027719 0.18288 27.993767 2021 07 553 489 28.653934 28.952322 28.822705 0.072132 28.822453 2021 08 553 489 29.234291 29.509806 29.367472 0.056142 29.37429 2021 09 553 489 27.5819 27.927999 27.758316 0.069799 27.757366 2021 10 553 489 25.781967 26.188354 26.011246 0.081132 26.010902 2021 11 553 489 19.598267 20.757734 20.361638 0.231124 20.406967 2021 12 553 489 17.964775 19.251354 18.749339 0.296122 18.817614 2022 01 553 489 15.723097 17.262678 16.631626 0.341067 16.658096 2022 02 553 489 14.640821 15.959429 15.312246 0.290148 15.315321 2022 03 553 489 18.952677 19.168581 19.061447 0.063443 19.071419 2022 04 553 489 21.480366 21.746468 21.60011 0.06592 21.590733 2022 05 553 489 25.795097 26.402775 26.057069 0.145155 26.02042 2022 06 553 489 29.389334 29.8375 29.582685 0.115593 29.57 2022 07 553 489 29.99729 30.239677 30.092081 0.062513 30.080935 2022 08 553 489 30.061031 30.521549 30.264433 0.109048 30.257967 2022 09 553 489 28.754601 29.055866 28.887236 0.071748 28.881367 2022 10 553 489 23.723259 24.60342 24.299363 0.195979 24.354065 2022 11 553 489 20.462725 21.865208 21.264294 0.349429 21.311449 2022 12 553 489 17.529581 19.759516 18.755327 0.519001 18.839418 2023 01 553 489 15.977968 18.162678 17.234933 0.531125 17.277388 2023 02 553 489 17.181429 18.016001 17.657314 0.200033 17.67625 2023 03 553 489 20.199032 20.772968 20.537047 0.184587 20.612516 2023 04 553 489 22.149103 22.378275 22.26941 0.061538 22.265207 2023 05 553 489 25.129354 25.390968 25.23532 0.066994 25.225225 2023 06 553 489 27.068167 27.474266 27.294812 0.081743 27.298567 2023 07 553 489 29.44729 29.891838 29.672081 0.102689 29.668549 2023 08 553 489 30.64929 31.103968 30.934115 0.098875 30.948225 2023 09 553 489 28.803699 29.137434 28.97684 0.06971 28.972567 2023 10 553 489 24.106936 24.776194 24.470838 0.154505 24.487387 2023 11 553 489 20.257334 21.183033 20.760151 0.203166 20.773167 2023 12 553 489 14.990267 16.618334 15.728472 0.372696 15.6924