Year	Percent
1970	7.19
1971	7.19
1972	7.19
1973	7.19
1974	7.19
1975	7.19
1976	7.19
1977	7.19
1978	7.19
1979	7.19
1980	8.04
1981	8.06
1982	8.81
1983	8.8
1988	8.86
1990	8.8
2003	10.41