Year	years
2003	4.6
2004	4.6
2005	4.6
2006	4.6
2007	3.3
2008	3.3
2009	3.3
2010	3.3
2011	3.3
2012	3.3
2013	3.3
2014	3.3
2015	3.3
2016	3.3
2017	3.3
2018	3.3
2019	3.3