Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            96        90        27.395033  27.588266  27.487105  0.04793    27.483566 
2008            96        90        29.261766  29.378799  29.352727  0.028468   29.365084 
2009            96        90        29.078167  29.267401  29.190785  0.041896   29.187784 
2010            96        90        29.887167  30.007601  29.947866  0.032854   29.952101 
2011            96        90        29.366434  29.439167  29.38957   0.018763   29.384633 
2012            96        90        28.189333  28.324633  28.276896  0.03581    28.285417 
2013            96        90        28.619534  28.742367  28.70661   0.026395   28.710283 
2014            96        90        28.807434  28.983767  28.92945   0.039911   28.937817 
2015            96        90        29.520367  29.730967  29.66346   0.03935    29.663533 
2016            96        90        29.180433  29.359367  29.287372  0.04157    29.287717 
2017            96        90        28.8465    28.927034  28.863756  0.014839   28.860233 
2018            96        90        29.6572    29.8018    29.736287  0.044401   29.737283 
2019            96        90        29.894367  29.961466  29.925746  0.022201   29.923    
2020            96        90        29.402134  29.612066  29.506479  0.058545   29.509951 
2021            96        90        28.9522    29.141966  29.066405  0.048103   29.071183 
2022            96        90        29.473467  29.607267  29.532057  0.026461   29.523216 
2023            96        90        28.9809    29.216934  29.113062  0.051952   29.134316