Year	Percent
1991	1.02
1992	0.91
1993	0.9
1994	0.97
1995	0.93
1996	0.81
1997	0.79
1998	0.62
1999	0.53
2000	0.52
2001	0.44
2002	0.6
2003	0.5
2004	0.49
2005	0.48
2007	0.16