Year	Percent
1960	123.07975
1961	125.69067
1962	120.6723
1963	146.66238
1964	94.96172
1965	105.12618
1966	170.44459
1967	44.09966
1968	91.39881
1969	87.09705
1970	72.95849
1971	77.27658
1972	52.53647
1973	70.04492
1974	64.42227
1975	103.29295
1976	41.91832
1977	219.96675
1978	162.28459
1979	201.98895
1980	187.55908
1981	198.42486
1982	208.98658
1983	207.25601
1984	182.20242
1985	134.28328
1986	216.05009
1987	174.5824
1988	173.97551
1989	126.63363
1990	362.18032