Year	1=low to 6=high
2005	3
2006	3
2007	3
2008	2.5
2009	2
2010	2.5
2011	2.5
2012	2.5
2013	2.5
2014	2.5
2015	2.5
2016	2.5
2017	2.5
2018	2.5
2019	2