Year	current US$
1960	-0.34934497035746986
1963	0.15078521063160308
1964	0.4323233682234788
1965	0.48326188167003703
1966	0.3304190423468878
1967	4.361650332280726
1968	0.30219515004024095
1969	0.40522157109046975
1970	0.44660550894528916
1971	1.3554910944235097
1972	6.448850722906792
1973	2.4798127187074184
1974	2.629356671874044
1975	3.269252808466592
1976	2.86274344855774
1977	2.2324185110619044
1978	3.6276368799985628
1979	4.05603704982493
1980	6.346311796474042
1981	6.097667908258129
1982	5.685317893038889
1983	3.7618455263408865
1984	41.631075532425804
1985	2.8462804728040787
1986	6.538970613287228
1987	2.5037359876647383
1988	5.452060099690768
1989	14.764984674902728
1990	11.637401111159084
1991	9.997898957694614
1992	10.036421656350253
1993	4.025485371598812
1994	3.401395252332507
1995	14.655120166933509