Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            309       273       5.102935   5.785387   5.490993   0.159865   5.488484  
2008            309       273       6.176226   6.768516   6.502961   0.142862   6.500936  
2009            309       273       7.17529    7.859549   7.584134   0.14533    7.581032  
2010            309       273       6.928      7.535      7.287937   0.137079   7.295322  
2011            309       273       8.012968   8.655871   8.3533     0.153329   8.337709  
2012            309       273       8.525064   8.953451   8.784907   0.097804   8.793581  
2013            309       273       5.937129   6.62958    6.344296   0.160617   6.354677  
2014            309       273       7.193258   7.870097   7.591718   0.144821   7.599323  
2015            309       273       7.853613   8.446581   8.150068   0.144393   8.123807  
2016            309       273       7.986548   8.853517   8.498584   0.188482   8.496677  
2017            309       273       6.719806   7.741032   7.31583    0.235049   7.324903  
2018            309       273       5.376516   6.43329    5.927729   0.249881   5.900484  
2019            309       273       7.180387   7.596129   7.420974   0.092964   7.423613  
2020            309       273       6.627129   7.309613   7.004783   0.152877   6.998129  
2021            309       273       7.639161   8.786129   8.333469   0.266962   8.342194  
2022            309       273       7.190581   7.869903   7.583526   0.151365   7.591387  
2023            309       273       6.147933   6.764833   6.494723   0.147231   6.484433