Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            274       250       13.1542    13.41      13.318444  0.043382   13.326283 
2008            274       250       11.459633  11.837667  11.645713  0.085408   11.649983 
2009            274       250       12.8707    13.374634  13.110303  0.107825   13.106083 
2010            274       250       12.7298    12.968433  12.824534  0.042053   12.824767 
2011            274       250       13.564667  13.916766  13.796251  0.070913   13.800834 
2012            274       250       13.599633  13.8156    13.699476  0.038667   13.699684 
2013            274       250       14.016     14.335767  14.208507  0.069369   14.2144   
2014            274       250       12.7587    13.226434  12.984461  0.104242   12.973283 
2015            274       250       11.284367  11.814867  11.572722  0.116825   11.577333 
2016            274       250       13.3177    13.9555    13.705286  0.134053   13.721066 
2017            274       250       13.496834  14.073067  13.837087  0.129006   13.838167 
2018            274       250       13.795267  14.218     14.021268  0.088086   14.01975  
2019            274       250       12.351967  12.792133  12.62237   0.101707   12.636617 
2020            274       250       13.9047    14.553467  14.219105  0.149086   14.246967 
2021            274       250       14.8397    15.523533  15.218001  0.162901   15.246467 
2022            274       250       13.3523    13.634434  13.483013  0.07205    13.47585  
2023            274       250       12.4512    13.051867  12.806389  0.157579   12.827633