Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            74        54        20.022066  20.2341    20.113939  0.050897   20.1106   
2008            74        54        18.142933  18.412434  18.257155  0.064348   18.248783 
2009            74        54        20.230667  20.4335    20.328854  0.050267   20.330784 
2010            74        54        19.317533  19.504467  19.404293  0.046152   19.404716 
2011            74        54        18.626633  18.910566  18.749117  0.069929   18.748033 
2012            74        54        18.258034  18.550568  18.390766  0.070775   18.390483 
2013            74        54        18.5508    18.856634  18.696978  0.076346   18.6965   
2014            74        54        17.835434  18.107666  17.963971  0.067414   17.963367 
2015            74        54        19.594534  19.856234  19.720462  0.065851   19.718383 
2016            74        54        17.743999  18.131666  17.918767  0.093031   17.9187   
2017            74        54        17.7876    18.153767  17.956312  0.088253   17.959749 
2018            74        54        18.993999  19.310034  19.128001  0.075099   19.119    
2019            74        54        18.819866  19.152401  18.972073  0.081116   18.974299 
2020            74        54        19.870234  20.164034  20.001378  0.07301    20.003783 
2021            74        54        15.581867  16.0219    15.773095  0.105239   15.7652   
2022            74        54        18.165518  18.46562   18.308139  0.075157   18.311983 
2023            74        54        17.307301  17.653233  17.468765  0.086011   17.47005