Year	Percent
1991	0.1151
1994	0.00891
1995	0.02173
1997	0.00981
1998	0.01883
1999	0.02354
2000	0.05351
2001	0.06536
2002	0.2466
2003	0.5445
2004	0.6792
2005	0.719
2006	1.478
2007	0.9729