Year	Percent
1995	5.62
1996	7.65
1997	8.93
1998	11.32
1999	11.86
2000	11.71
2001	11.06
2002	10.14
2003	9.06
2004	8.59
2005	7.18
2006	6.81
2007	6.35
2008	6.36
2009	8.84
2010	8.1
2011	7.85
2012	7.53
2013	7.17
2014	9.27
2015	9.14
2016	9.35
2017	9.5
2018	8.8
2019	8.19
2020	9.48