Year	Percent
1985	8.311
1986	14.31
1987	4.445
1988	7.47
1989	4.44
1990	7.952
1991	2.765
1992	6.897
1994	12.08
1995	11.34
1996	11.34
1998	3.21
1999	1.068
2000	1.448
2001	26.53
2002	3.493
2003	5.201
2004	3.606
2005	2.496
2006	8.234
2007	5.809