Year	Percent
1971	65.07804
1972	111.19034
1973	90.87764
1974	107.93217
1975	124.08938
1976	115.3908
1977	111.45572
1978	107.12098
1979	100.67568
1980	91.63814
1981	92.07155
1983	98.94049