Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            309       273       12.295452  12.611968  12.477758  0.070647   12.486516 
2008            309       273       11.773678  11.916936  11.827609  0.035981   11.815968 
2009            309       273       11.300323  11.406581  11.340494  0.026245   11.337    
2010            309       273       11.994936  12.190645  12.045324  0.040368   12.037903 
2011            309       273       12.794774  12.973323  12.873125  0.048053   12.876806 
2012            309       273       13.008967  13.293775  13.067734  0.04763    13.06     
2013            309       273       12.844646  13.047065  12.938981  0.039402   12.935967 
2014            309       273       12.703096  12.896839  12.767138  0.04016    12.760936 
2015            309       273       11.928355  12.060452  11.974699  0.029149   11.968935 
2016            309       273       12.993387  13.198807  13.050625  0.033949   13.04658  
2017            309       273       13.164419  13.314065  13.244487  0.036365   13.251839 
2018            309       273       12.579516  12.784742  12.65132   0.048174   12.636903 
2019            309       273       12.427581  12.518032  12.459568  0.023531   12.457355 
2020            309       273       12.296741  12.575645  12.380448  0.055271   12.377774 
2021            309       273       14.063709  14.330322  14.219324  0.068755   14.23842  
2022            309       273       13.319581  13.490807  13.367653  0.037243   13.356194 
2023            309       273       13.613774  13.940452  13.820834  0.092609   13.860645