Year	Percent
1993	9.78
1994	11.1
1995	12.48
1996	13.82
1997	12.68
1998	14.31
1999	12.84
2001	9.07
2002	10.04
2005	10.91
2006	9.39
2007	8.51
2008	8.18
2013	8.35
2014	8.24
2015	7.58
2016	7
2017	6.6
2019	9.05