Year	current US$
1970	25419999.599456802
1971	22020000.934600793
1972	22340000.15258786
1973	35569999.69482425
1974	42780000.6866455
1975	64800001.144409195
1976	86459999.0844726
1977	126180002.2125244
1978	87139999.3896485
1979	81709999.0844726
1980	68610000.6103516
1981	93180000.30517581
1982	55959999.0844727
1983	62599998.47412111
1984	28229999.5422363
1985	55190000.5340577
1986	41809999.465942346
1987	39889999.747276284
1988	41379999.16076665
1989	35530001.640319824
1990	43740000.247955345
1991	61559997.558593705
1992	30800000.19073482
1993	71809999.9427795
1994	118390001.2969971
1995	83180001.25885007
1996	176949995.0408936
1997	119010002.13623041
1998	61629999.1607666
1999	56149999.6185302
2000	82050001.14440921
2001	127259997.60627772
2002	63799998.2833862