Year	Percent
1985	0.7862
1986	1.974
1987	0.4631
1988	3.163
1989	3.023
1990	4.095
1991	6.291
1992	10.04
1994	16.99
1995	11.02
1996	11.02
1998	8.713
1999	10.02
2000	3.397
2001	3.973
2002	3.279
2003	2.355
2004	3.372
2005	2.426
2006	1.649
2007	1.912