Year	1=low to 6=high
2005	3.236842105263158
2006	3.225
2007	3.2375
2008	3.2125
2009	3.2560975609756095
2010	3.341463414634146
2011	3.3780487804878048
2012	3.313953488372093
2013	3.2954545454545454
2014	3.2906976744186047
2015	3.244186046511628
2016	3.2209302325581395
2017	3.215909090909091
2018	3.255813953488372
2019	3.272727272727273
2020	3.3068181818181817
2021	3.313953488372093
2022	3.3295454545454546
2023	3.2954545454545454