Year	1=low to 6=high
2005	2.9909090909090907
2006	2.9464285714285716
2007	2.9622641509433962
2008	2.9622641509433962
2009	2.9814814814814814
2010	2.9814814814814814
2011	3.0090909090909093
2012	3.0267857142857144
2013	3.008771929824561
2014	3.0096153846153846
2015	3.0576923076923075
2016	3.061224489795918
2017	3.061224489795918
2018	3.0510204081632653
2019	3.09
2020	3.0520833333333335
2021	3.0729166666666665
2022	3.0510204081632653
2023	3.0714285714285716