Year	years
2003	2.3
2004	2.3
2005	2.3
2006	2.3
2007	2.3
2008	2.3
2009	2.3
2010	2.3
2011	1.5
2012	1.5
2013	1.5
2014	1
2015	1
2016	1
2017	1
2018	1
2019	1