Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            178       62        18.4842    18.721134  18.588511  0.054359   18.580716 
2008            178       62        16.649233  17.113466  16.918718  0.089355   16.915549 
2009            178       62        19.1106    19.466999  19.320808  0.067925   19.320184 
2010            178       62        18.965467  19.362366  19.234858  0.070495   19.2409   
2011            178       62        17.480034  18.123634  17.900866  0.121297   17.91595  
2012            178       62        16.302601  16.743633  16.543576  0.087499   16.53345  
2013            178       62        17.649433  18.198767  17.99307   0.100663   17.9934   
2014            178       62        17.294434  17.854567  17.649906  0.098481   17.65195  
2015            178       62        19.667801  20.045     19.887981  0.074155   19.89225  
2016            178       62        18.329332  18.891068  18.684224  0.106913   18.690316 
2017            178       62        17.539534  18.129566  17.91445   0.121355   17.92995  
2018            178       62        18.264366  18.701099  18.502022  0.0909     18.50025  
2019            178       62        17.871666  18.393267  18.19701   0.099798   18.206067 
2020            178       62        20.165567  20.525467  20.382155  0.068526   20.389067 
2021            178       62        16.004534  16.747267  16.486014  0.139799   16.492917 
2022            178       62        17.955034  18.583586  18.404637  0.115159   18.421172 
2023            178       62        17.177067  17.826866  17.571656  0.138992   17.582717