Year	1=low to 6=high
2005	3.4909090909090907
2006	3.4732142857142856
2007	3.4622641509433962
2008	3.4716981132075473
2009	3.5
2010	3.4814814814814814
2011	3.4272727272727272
2012	3.357142857142857
2013	3.307017543859649
2014	3.2115384615384617
2015	3.201923076923077
2016	3.13265306122449
2017	3.173469387755102
2018	3.142857142857143
2019	3.18
2020	3.1875
2021	3.1770833333333335
2022	3.1020408163265305
2023	3.1020408163265305