Year	Percent
1994	10.97
1995	10.96
1996	9.51
1997	9.87
1998	10.25
1999	12.96
2000	15.92
2001	16.09
2002	15.39
2003	14.7
2004	16.5
2005	14.46
2006	11.88
2007	10.21
2008	8.71
2009	10.81
2010	12.83
2011	12.1
2012	12.37
2013	12.83
2014	12.04
2015	10.47
2016	8.66
2017	7.59
2018	6.12
2019	5.25
2020	6.24