Year	1=low to 6=high
2009	3
2010	3
2011	3
2012	3
2013	3.5
2014	3
2015	3
2016	2.5
2017	2.5
2018	2.5
2019	3
2020	3
2021	3.5
2022	3.5
2023	3.5