Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            560       525       21.3999    21.638767  21.502957  0.059996   21.473667 
2008            560       525       21.993567  22.4361    22.222067  0.123965   22.180634 
2009            560       525       21.2812    21.717133  21.47312   0.10453    21.465366 
2010            560       525       21.3857    21.698166  21.543481  0.058466   21.555233 
2011            560       525       22.674103  23.225206  22.959333  0.158044   22.896172 
2012            560       525       24.149733  24.327366  24.236561  0.045725   24.242901 
2013            560       525       20.170666  20.533234  20.34528   0.079988   20.345066 
2014            560       525       20.196466  20.443466  20.357864  0.063975   20.384266 
2015            560       525       21.951834  22.179966  22.095569  0.055965   22.1085   
2016            560       525       22.2717    22.505934  22.446111  0.051343   22.463867 
2017            560       525       23.302933  23.418833  23.369974  0.027512   23.3715   
2018            560       525       21.7885    21.959034  21.836835  0.033461   21.824699 
2019            560       525       21.382267  21.720966  21.546967  0.097997   21.524599 
2020            560       525       23.305534  23.543833  23.410376  0.051932   23.404633 
2021            560       525       21.433767  22.100267  21.774581  0.16731    21.7526   
2022            560       525       22.146233  22.299267  22.226058  0.044965   22.210533 
2023            560       525       22.527828  22.838242  22.680453  0.069681   22.677206