Year	1=low to 6=high
2005	2.9565217391304355
2006	2.9519999999999995
2007	2.96
2008	2.94
2009	3.0128205128205128
2010	2.9935897435897427
2011	2.976190476190476
2012	2.9555555555555557
2013	2.967741935483871
2014	2.973118279569892
2015	2.962365698924731
2016	2.930107634408602
2017	2.875
2018	2.9032258064516125
2019	2.843749989583333
2020	2.812499999999999
2021	2.817204322580645
2022	2.79166665625
2023	2.7812500625