Year	Percent
1993	5.36
1995	3.95
1996	3.26
1997	3.74
1998	4.01
1999	3.09
2000	13.12
2003	14.81
2004	14.41
2005	14.53
2006	12.2
2008	13.4
2012	14.81
2014	10.03