Year	Percent
1995	13.4
1996	13.2
1997	13.8
1998	13.7
1999	13.7
2000	12.6
2001	12.8
2002	13.8
2003	15.2
2004	18.5
2005	20.85
2006	20.85
2007	18.06
2008	13.7
2009	16.14
2010	19.22
2011	22.97
2012	24
2013	22.15
2014	19.22
2015	17.66
2016	15.26
2017	13.48
2018	12.73
2019	10.39
2020	9.01