Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1808      1738      28.814194  29.192839  28.991179  0.081766   28.988613 
2008            1808      1738      29.851517  30.339001  30.068135  0.119679   30.037904 
2009            1808      1738      29.530903  29.825129  29.651544  0.063585   29.646338 
2010            1808      1738      29.823742  30.057226  29.931521  0.049451   29.937613 
2011            1808      1738      29.993677  30.371258  30.135094  0.099203   30.110597 
2012            1808      1738      29.727709  29.941872  29.842143  0.049624   29.838145 
2013            1808      1738      29.065001  29.372871  29.18397   0.081882   29.160081 
2014            1808      1738      29.353645  29.706646  29.516451  0.084192   29.496016 
2015            1808      1738      30.154581  30.637161  30.425617  0.106207   30.452904 
2016            1808      1738      30.447453  30.687098  30.564185  0.052316   30.564806 
2017            1808      1738      29.765194  30.28158   30.031929  0.120328   30.048355 
2018            1808      1738      30.122194  30.52787   30.389204  0.074044   30.398016 
2019            1808      1738      29.224838  29.613903  29.411565  0.085828   29.399193 
2020            1808      1738      29.573645  29.974226  29.808565  0.095465   29.82342  
2021            1808      1738      29.365517  29.623451  29.491393  0.052215   29.484871 
2022            1808      1738      30.339418  30.72858   30.552287  0.0798     30.566241 
2023            1808      1738      31.19413   31.747677  31.432366  0.119896   31.418339