Year	current US$
1970	4939999.964088204
1971	4530000.010505314
1972	4979999.9669194175
1973	5500000.024214386
1974	11359999.895095825
1975	5509999.927133322
1976	5850000.007078045
1977	7729999.912902713
1978	9400000.015273686
1979	10359999.950975178
1980	4770000.003278254
1981	12369999.98055398
1982	12200000.070035454
1983	15989999.819546936
1984	13930000.014603138
1985	18519999.895244833
1986	16849999.99776482
1987	23010000.074282274
1988	17560000.03218652
1989	21530000.131577257
1990	21799999.91878866
1991	28299999.91506339
1992	27029999.917373065
1993	33560000.132769346
1994	27909999.996423706
1995	51559999.81611968
1996	26369999.91536141
1997	33250000.07450581
1998	27879999.8909235
1999	34150000.15497208
2000	36210000.29146671
2001	32079999.789595596
2002	32930000.15616416
2003	35900000.2630055
2004	33310000.112280246
2005	41060000.1681596
2006	31940000.351518396
2007	32709999.54640865
2008	18179999.82088804