Year	Percent
1993	9.75
1999	6.65
2000	5.87
2001	6.2
2002	6.6
2003	5.92
2004	6.11
2005	5.55
2006	4.68
2007	4.32
2008	3.63
2009	4.32
2010	3.49
2011	2.68
2012	2.76
2013	3.13
2014	2.87
2015	3
2016	2.9