Year	Percent
1994	12.41
1995	11.82
1996	13.82
1997	17.71
1998	17.97
1999	16
2000	12.64
2002	17.29
2003	17.16
2004	17.48
2005	15
2006	12.4
2007	10
2008	11.04
2009	14.39
2011	17.61
2012	17.09
2013	20.66
2015	21.3364
2016	19.3903