Year	1=low to 6=high
2005	2.5
2006	2.5
2007	3
2008	3
2009	3
2010	3
2011	3
2012	3.5
2013	3.5
2014	3.5
2015	3.5
2016	3.5
2017	3.5
2018	3.5
2019	3.5