Year	1=low to 6=high
2009	5
2010	5
2011	4.5
2012	4.5
2013	4.5
2014	4.5
2015	4.5
2016	5
2017	5
2018	4.5
2019	4.5
2020	4.5
2021	4.5
2022	4.5
2023	4.5