Year	Percent
1993	7.88
1994	7.99
1995	8.69
1996	9.87
1997	8.08
1998	10.55
1999	8.38
2000	7.9
2001	10.83
2002	9.13
2003	8.69
2004	7.68
2005	9.84
2006	9.25
2007	9.43
2008	6.73
2009	7.15
2010	6.98
2011	7.47
2012	7.74
2013	7.67
2014	7.37
2015	6.88
2016	7.1
2017	6.99