Year	1=low to 6=high
2005	2.926315789473685
2006	2.897500000000001
2007	2.9050000000000002
2008	2.8950000000000005
2009	2.9073170731707316
2010	2.9146341463414633
2011	2.9268292682926824
2012	2.874418604651163
2013	2.8613636363636363
2014	2.8906976744186035
2015	2.87906976744186
2016	2.8813953488372093
2017	2.8318181818181816
2018	2.8441860465116275
2019	2.8
2020	2.788636363636364
2021	2.7651162790697676
2022	2.7204545454545457
2023	2.7022727272727276