Year	1=low to 6=high
2005	2.9
2006	2.8823529411764706
2007	2.8823529411764706
2008	2.872549019607843
2009	2.8773584905660377
2010	2.8679245283018866
2011	2.9
2012	2.8596491228070176
2013	2.8448275862068964
2014	2.8275862068965516
2015	2.853448275862069
2016	2.8596491228070176
2017	2.8275862068965516
2018	2.8508771929824563
2019	2.847457627118644
2020	2.8275862068965516
2021	2.8157894736842106
2022	2.7457627118644066
2023	2.7542372881355934