Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            2271      1991      11.5792    13.148666  12.183144  0.411869   12.034634 
2008            2271      1991      10.438233  11.7021    10.918963  0.339158   10.845567 
2009            2271      1991      11.716333  13.183534  12.564423  0.313794   12.554234 
2010            2271      1991      11.0964    12.599234  11.758489  0.391449   11.6815   
2011            2271      1991      10.9359    12.757633  11.917687  0.422799   11.959666 
2012            2271      1991      9.600067   11.334367  10.525171  0.427423   10.591766 
2013            2271      1991      10.9196    12.366366  11.65058   0.361172   11.6868   
2014            2271      1991      10.243733  12.268033  11.317494  0.537805   11.387466 
2015            2271      1991      12.668333  14.3983    13.41527   0.441152   13.283667 
2016            2271      1991      11.975266  13.584233  12.731992  0.426552   12.616734 
2017            2271      1991      11.829866  13.941433  12.873944  0.517725   12.8284   
2018            2271      1991      10.273267  12.653767  11.488776  0.601239   11.5173   
2019            2271      1991      11.049467  12.8824    11.980318  0.446497   12.0024   
2020            2271      1991      12.719434  14.6603    13.656852  0.454846   13.6332   
2021            2271      1991      11.507867  13.406233  12.373964  0.451611   12.299633 
2022            2271      1991      12.343138  14.153517  13.231597  0.430788   13.15231  
2023            2271      1991      11.7363    13.796634  12.738667  0.489908   12.5863