Year	Percent
1984	3.227
1985	7.753
1986	5.638
1992	0.05118
1997	0.3454
1999	0.06627
2000	0.3955
2001	1.14
2002	2.876
2003	1.49
2004	0.7234
2005	1.184
2006	3.976
2007	6.542