Year	Percent
1983	0.82
1984	2.5
1986	1.44
1987	1.67
1988	1.19
1989	1.98
1990	2.41
1991	3.39
1992	1.75
1993	2.22
1996	4.61
1998	3.1
2000	3.73
2001	0.8
2007	1.93