Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            274       250       9.154967   9.276387   9.234567   0.031769   9.242629  
2008            274       250       7.923742   7.966129   7.94479    0.010143   7.944597  
2009            274       250       7.611032   7.791355   7.672225   0.046371   7.662307  
2010            274       250       9.610806   9.807387   9.709221   0.043093   9.707968  
2011            274       250       7.992097   8.187549   8.074366   0.037682   8.070387  
2012            274       250       7.336806   7.557645   7.4164     0.059265   7.412403  
2013            274       250       8.273516   8.369516   8.333504   0.023424   8.336452  
2014            274       250       9.450807   9.562419   9.499715   0.027883   9.495484  
2015            274       250       10.792774  11.089968  10.915649  0.07582    10.909629 
2016            274       250       10.112678  10.300968  10.183623  0.051268   10.173161 
2017            274       250       8.80329    8.99458    8.909554   0.041198   8.913291  
2018            274       250       8.128097   8.386935   8.26814    0.062457   8.279984  
2019            274       250       8.370839   8.632968   8.508646   0.055828   8.506984  
2020            274       250       8.243999   8.310162   8.276815   0.016849   8.276064  
2021            274       250       8.106968   8.265774   8.179132   0.040144   8.184758  
2022            274       250       8.433419   8.571742   8.502974   0.037261   8.5115    
2023            274       250       7.557935   7.717806   7.663168   0.045872   7.677742