Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            96        90        30.498096  30.664387  30.561841  0.046857   30.550871 
2008            96        90        29.764162  29.842484  29.791341  0.016811   29.788371 
2009            96        90        30.366549  30.546419  30.430621  0.034433   30.427791 
2010            96        90        30.606646  30.641743  30.633405  0.007131   30.63508  
2011            96        90        30.640774  30.833902  30.712549  0.051105   30.704774 
2012            96        90        30.289129  30.514225  30.323815  0.047945   30.311258 
2013            96        90        30.099356  30.410065  30.206351  0.079663   30.197226 
2014            96        90        30.87858   30.954775  30.914136  0.018712   30.914452 
2015            96        90        30.09429   30.185774  30.151653  0.021793   30.155419 
2016            96        90        30.317904  30.408968  30.364526  0.020042   30.366113 
2017            96        90        30.958807  31.066677  31.018345  0.02461    31.016807 
2018            96        90        30.558193  30.683903  30.621567  0.029711   30.629372 
2019            96        90        29.908516  30.00387   29.949194  0.025963   29.950999 
2020            96        90        30.756388  30.882774  30.821894  0.030089   30.82329  
2021            96        90        30.299322  30.600388  30.360403  0.07413    30.325839 
2022            96        90        30.34458   30.471645  30.4102    0.029811   30.4185   
2023            96        90        31.496     31.601871  31.523636  0.026437   31.514581