Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            66        42        20.931644  21.160517  21.061894  0.063602   21.072725 
2008            66        42        18.178904  18.253     18.224423  0.014576   18.227887 
2009            66        42        17.911226  18.11871   18.026704  0.052431   18.032694 
2010            66        42        18.263548  18.451645  18.38864   0.053823   18.399629 
2011            66        42        18.387516  18.588129  18.516897  0.056235   18.536113 
2012            66        42        18.684872  18.832548  18.770849  0.037769   18.777806 
2013            66        42        18.585419  18.704967  18.669439  0.032985   18.682386 
2014            66        42        19.256903  19.462484  19.37364   0.050884   19.378678 
2015            66        42        18.012936  18.11842   18.06338   0.027188   18.064048 
2016            66        42        19.097485  19.196226  19.159235  0.025188   19.162758 
2017            66        42        20.393     20.544483  20.499532  0.04223    20.513178 
2018            66        42        20.505613  20.884645  20.767211  0.109958   20.814468 
2019            66        42        19.376871  19.516323  19.461061  0.043758   19.473354 
2020            66        42        19.314386  19.457613  19.377747  0.03565    19.372258 
2021            66        42        20.184484  20.286936  20.247875  0.027531   20.247645 
2022            66        42        17.296354  17.491226  17.422567  0.039661   17.422952 
2023            66        42        18.691257  18.759258  18.733204  0.013621   18.732565