Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            560       525       22.011499  22.662167  22.365513  0.180194   22.371    
2008            560       525       21.515301  22.181     21.834514  0.197879   21.796801 
2009            560       525       20.827934  21.445566  21.172869  0.172108   21.2148   
2010            560       525       21.8988    22.437433  22.160356  0.15941    22.145834 
2011            560       525       21.466101  22.1357    21.800712  0.207223   21.788567 
2012            560       525       21.577101  22.417933  21.982211  0.20916    21.992001 
2013            560       525       22.2596    22.815134  22.563523  0.150182   22.583    
2014            560       525       21.179966  22.081034  21.659149  0.22961    21.6049   
2015            560       525       22.395901  23.021299  22.742467  0.149601   22.743433 
2016            560       525       23.123466  23.7437    23.423425  0.168467   23.399    
2017            560       525       22.632366  23.336533  23.004227  0.174188   22.991934 
2018            560       525       21.306101  22.325933  21.807388  0.279209   21.760134 
2019            560       525       19.485567  20.750299  20.115671  0.345961   20.087833 
2020            560       525       22.527334  23.014767  22.726685  0.126696   22.674967 
2021            560       525       21.463867  22.428633  21.924264  0.257601   21.929567 
2022            560       525       22.167828  22.645758  22.387762  0.140491   22.358034 
2023            560       525       20.574867  21.585001  21.085125  0.267712   21.017067