Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            42        34        17.353825  17.480675  17.412621  0.039161   17.406419 
2008            42        34        17.408867  17.519789  17.466819  0.034624   17.465078 
2009            42        34        17.712984  17.793167  17.754182  0.022773   17.752184 
2010            42        34        17.101101  17.15852   17.131046  0.015704   17.131096 
2011            42        34        16.987341  17.046103  17.018546  0.016245   17.016324 
2012            42        34        17.759666  17.823532  17.792673  0.017655   17.792626 
2013            42        34        17.56991   17.639299  17.607934  0.019575   17.608289 
2014            42        34        19.009184  19.075211  19.042537  0.020532   19.041026 
2015            42        34        19.284229  19.363535  19.322181  0.024839   19.319087 
2016            42        34        18.354759  18.523243  18.43659   0.05257    18.42912  
2017            42        34        18.344803  18.424173  18.385538  0.024135   18.385007 
2018            42        34        18.431444  18.54512   18.49021   0.035488   18.488883 
2019            42        34        17.789248  17.923296  17.845879  0.043582   17.832949 
2020            42        34        18.27309   18.412945  18.328025  0.045512   18.312617 
2021            42        34        17.520082  17.645626  17.577592  0.040224   17.568312 
2022            42        34        18.037888  18.136745  18.084984  0.030518   18.080998 
2023            42        34        17.104403  17.231815  17.15943   0.04143    17.147448