Year	Percent
1990	9.9
1991	10
1992	10.3
1993	10.5
1994	10.9
1995	11.4
1996	11.6
1997	11.8
1998	12.97
1999	13.04
2000	13.35
2001	13.36
2002	14.4
2003	13.11
2004	14.4
2006	13.88