Year	current US$
1960	0.11717010494320274
1961	5.359475544837195
1962	7.779447542797468
1963	0.4070128219820538
1964	0.6802456687594574
1965	0.7429006390047054
1966	0.7104984876316482
1967	0.5950964081513177
1968	0.24437130860388798
1969	0.2343530241652947
1970	0.07499456121793105
1971	0.36057866200119787
1972	0.1389989266013733
1973	0.8050179271981418
1974	0.9720440527785166
1975	0.8769017844703576
1976	0.6664081774581617
1977	0.4690431414860501
1978	0.5676142124359503
1979	0.49463868610933
1980	0.15964154793475824
1981	0.9788818984941394
1982	1.3457609067877985
1983	2.120246900901654
1984	3.773022434969797
1985	6.30292760258303
1986	11.052368043221852
1987	13.629938789529936
1988	18.394247243615975
1989	17.96541634766052
1990	14.813231553865643
1991	13.41436257896346
1992	19.357210418862216
1993	17.80740665744585
1994	18.01771020563427
1995	14.343172823040787