Year	Percent
1993	2.9
1995	5.7
1996	7.1
2004	5.5
2005	5
2006	2.7
2007	1.5
2008	2.5
2009	3.7
2010	3.7
2011	3
2012	2.7
2013	2.5
2014	1.7
2015	1.5