Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            38        33        16.153419  16.342291  16.249541  0.056847   16.252226 
2008            38        33        14.188548  14.342807  14.272743  0.043427   14.283581 
2009            38        33        15.129807  15.327065  15.234908  0.056548   15.246613 
2010            38        33        13.615291  13.760064  13.694833  0.041088   13.704613 
2011            38        33        14.910903  15.096387  15.020018  0.049254   15.024194 
2012            38        33        15.473678  15.643097  15.563641  0.049069   15.57271  
2013            38        33        15.031322  15.228678  15.143608  0.053514   15.157129 
2014            38        33        15.051323  15.309774  15.201594  0.069825   15.21042  
2015            38        33        15.44558   15.68571   15.581634  0.065197   15.593774 
2016            38        33        13.381097  13.675355  13.549322  0.080053   13.560064 
2017            38        33        13.706355  14.030484  13.879812  0.091494   13.899355 
2018            38        33        14.904033  15.16713   15.040723  0.074993   15.055097 
2019            38        33        16.764257  16.977386  16.890903  0.057952   16.900064 
2020            38        33        15.893129  16.155548  15.995317  0.065781   15.983322 
2021            38        33        14.340451  14.628774  14.463084  0.081956   14.463129 
2022            38        33        15.574387  15.857323  15.731094  0.079126   15.750355 
2023            38        33        14.163484  14.564484  14.370634  0.120003   14.383677