Tax Year
Rate
2004 – 2009
3.07%
1993 – 2003
2.8%
1992
2.95%
1991
2.6%
1987 – 1990
2.1%
1986
2.16%
1985
2.35%
1984
2.4%
1978 – 1982
2.2%
1974 – 1977
2.0%
1971 – 1973
2.3%