Year	1=low to 6=high
2005	3.15
2006	3.1199999999999997
2007	3.1624999999999996
2008	3.225
2009	3.233333333333333
2010	3.2444444444444445
2011	3.2875
2012	3.3625000000000003
2013	3.375
2014	3.2199999999999998
2015	3.2
2016	3.18
2017	3.1999999999999997
2018	3.1999999999999997
2019	3.2
2020	3.175
2021	3.3000000000000003
2022	3.275
2023	3.325