Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            590       553       26.551805  26.733517  26.645106  0.040531   26.650614 
2008            590       553       26.499096  27.124903  27.011071  0.121188   27.062775 
2009            590       553       26.498838  27.384871  27.136337  0.207855   27.225323 
2010            590       553       27.094517  28.030773  27.835002  0.20068    27.907969 
2011            590       553       27.197001  27.954775  27.701156  0.131298   27.719839 
2012            590       553       26.544291  27.450096  27.189055  0.223738   27.289387 
2013            590       553       26.629227  27.224096  26.934855  0.131229   26.936386 
2014            590       553       27.005194  27.332548  27.240985  0.069501   27.255936 
2015            590       553       27.275354  27.69113   27.570162  0.061231   27.575161 
2016            590       553       27.302225  27.903645  27.655872  0.163089   27.704935 
2017            590       553       27.287645  27.674387  27.488441  0.065771   27.489967 
2018            590       553       26.562452  26.757612  26.6725    0.044402   26.669323 
2019            590       553       27.31258   27.679935  27.583167  0.070395   27.600451 
2020            590       553       26.992516  27.439354  27.175396  0.097299   27.175451 
2021            590       553       27.080839  27.843355  27.529439  0.148214   27.562225 
2022            590       553       27.420774  28.286806  28.073335  0.1813     28.129452 
2023            590       553       27.639999  28.526031  28.200078  0.179239   28.259645