Year	1=low to 6=high
2011	2.8
2012	2.8
2013	2.8
2014	2.8
2015	2.8
2016	2.8
2017	2.8
2018	2.8
2019	2.8
2020	2.8
2021	2.8
2022	2.8
2023	2.8