Year	current US$
1970	3750000.007450581
1971	5360000.047832727
1972	5829999.973997468
1973	5550000.000745057
1974	5760000.078007575
1975	7370000.034570692
1976	7969999.998807898
1977	10829999.953508379
1978	13369999.926537268
1979	11499999.821186064
1980	4789999.982342123
1981	16510000.050067903
1982	16300000.086426742
1983	22820000.231266014
1984	19379999.786615364
1985	27530000.060796738
1986	25289999.991655365
1987	31530000.03099441
1988	23310000.166296948
1989	30390000.313520443
1990	28599999.874830235
1991	35389999.98569488
1992	28120000.183582317
1993	42949999.95827675
1994	33950000.28610231
1995	67859999.83549117
1996	30899999.97615814
1997	47170000.255107895
1998	32710000.03814696
1999	50850000.3218651
2000	59220000.5054474
2001	40850000.41127205
2002	58470000.26702881
2003	63590000.271797195
2004	52199999.57084655
2005	67569999.81403354
2006	40300000.04172327
2007	58130000.29325486
2008	19899999.985471375