Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1080      952       28.4221    29.1063    28.648195  0.136075   28.626067 
2008            1080      952       27.153299  27.583633  27.3538    0.102041   27.349    
2009            1080      952       27.710699  28.327301  28.04385   0.163726   28.06565  
2010            1080      952       28.645134  28.937901  28.800982  0.055827   28.80125  
2011            1080      952       27.628033  27.814499  27.688834  0.040582   27.680417 
2012            1080      952       27.114767  27.496599  27.249274  0.079439   27.24745  
2013            1080      952       28.680933  29.1709    28.89249   0.115446   28.887534 
2014            1080      952       28.943233  29.404699  29.148718  0.135425   29.163733 
2015            1080      952       27.832867  28.313034  28.003656  0.101656   27.994217 
2016            1080      952       29.193333  29.537901  29.333547  0.065957   29.32825  
2017            1080      952       27.238033  27.866266  27.527296  0.15082    27.513667 
2018            1080      952       29.280367  29.762234  29.614692  0.110829   29.6513   
2019            1080      952       29.373034  29.674099  29.558492  0.068017   29.573467 
2020            1080      952       27.830101  28.111567  27.92618   0.063804   27.90505  
2021            1080      952       26.791933  27.810633  27.417835  0.238072   27.481083 
2022            1080      952       28.400534  29.143     28.742683  0.147037   28.70515  
2023            1080      952       28.813667  29.602034  29.131565  0.161712   29.1144