Year	1=low to 6=high
2005	2.875
2006	2.8902439024390243
2007	2.902439024390244
2008	2.8658536585365852
2009	2.8902439024390243
2010	2.841463414634146
2011	2.9047619047619047
2012	2.9404761904761907
2013	2.9651162790697674
2014	2.951219512195122
2015	2.9634146341463414
2016	2.9210526315789473
2017	2.9210526315789473
2018	2.9078947368421053
2019	2.923076923076923
2020	2.9342105263157894
2021	2.9342105263157894
2022	2.923076923076923
2023	2.9358974358974357