Year	Percent
1984	5
1985	5.32
1986	5.62
1995	8.92
1996	6.76
1997	10.62
1998	10.13
2000	10.63
2004	8.9
2005	11.71
2006	9.15
2007	6.08
2008	4.93
2009	5.69
2011	5.69