Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            590       553       24.482452  25.129549  24.745642  0.133079   24.727324 
2008            590       553       23.156322  24.129065  23.523568  0.206992   23.488678 
2009            590       553       22.243225  23.039354  22.533677  0.172299   22.502096 
2010            590       553       23.019548  23.634386  23.345598  0.154543   23.345516 
2011            590       553       21.863129  22.921774  22.271653  0.221091   22.249001 
2012            590       553       22.615129  23.699839  23.062721  0.233317   23.049484 
2013            590       553       23.665194  24.524355  23.983332  0.163599   23.961355 
2014            590       553       23.589838  24.636032  24.085126  0.236902   24.077742 
2015            590       553       23.749065  24.658516  24.179283  0.200273   24.166967 
2016            590       553       24.618065  25.30887   24.967205  0.151684   24.970419 
2017            590       553       24.201872  25.036516  24.702525  0.193973   24.721193 
2018            590       553       22.682386  23.791967  23.233948  0.26853    23.227613 
2019            590       553       23.189259  24.388     23.736051  0.256797   23.719582 
2020            590       553       24.192387  25.082806  24.564264  0.200176   24.535065 
2021            590       553       22.499645  23.498259  22.93629   0.218956   22.90971  
2022            590       553       23.660967  24.678452  24.152402  0.219749   24.14887  
2023            590       553       23.834387  24.868225  24.272789  0.229752   24.247936