Year	Percent
1993	7.39
1994	7.92
1995	8.92
1996	10.17
1997	8.74
1998	10.52
1999	8.25
2000	8.26
2001	10.95
2002	9.52
2003	8.45
2004	7.66
2005	9.53
2006	8.76
2007	9.03
2008	6.19
2009	7.14
2010	6.54
2011	7.03
2012	7.56
2013	7.08
2014	6.94
2015	6.13
2016	5.81
2017	6.16