Year	Percent
1982	0.01258
1990	0.4
1991	0.6
1992	1
1993	1.4
1994	1.7
1995	1.8
1996	1.9
1997	1.9
1998	1.8
1999	1.8
2000	1.7
2001	1.6
2002	1.5
2003	1.4
2004	1.3
2005	1.2
2006	1.1
2007	1.1
2008	1
2009	1.2
2010	1.1
2011	1.1