Year	Percent
1982	5.21
1983	6.14
1984	5.1
1985	4.29
1986	3.95
1987	4.99
1988	4.57
1989	4.13
1990	3.8
1991	3.72
1992	4.13
1993	4.66
1994	4.96
1995	5.91
1996	6.85
1997	7.57
1998	7.5
1999	5.93
2000	6.3
2001	6.03
2002	7.16
2003	7.45
2004	12.12
2005	11
2006	9.79
2007	9.43
2008	8.51
2009	10.68
2010	9.47
2011	8.94
2012	9.4
2013	9.67
2014	10.28
2015	10.59
2016	11.25
2017	9.8
2018	9.39
2019	8.54
2020	10.48