Year	current US$
1973	8788397.362504302
1974	46124419.432645865
1975	54177138.40522416
1976	27820037.217514355
1977	20045895.13228076
1978	71941167.05876777
1979	36113103.79273282
1980	31523366.695563085
1981	30715995.438395444
1982	80435126.55979247
1983	110915989.01225184
1984	-1981066.6628932063
1985	59333475.65611481
1986	2847819.5105726644
1987	22275113.03940748
1988	45484697.034827225
1989	68490072.92562051
1990	54967565.47186723
1991	71344156.00398529
1992	49954555.231005125
1993	45425865.21509829
1994	27471253.90821511
1995	35985951.60792429
1996	58790994.55223048
1997	60811807.22048993
1998	41470512.86173131
1999	36290937.36814766
2000	21664727.926033888
2001	18837274.778557263
2002	69699660.81271933
2003	71864945.99379121
2004	52290528.442220286
2005	68979523.59076907
2006	91746039.91515549
2007	83073037.99087293
2008	90199283.10514957
2009	117872637.99091712
2010	125821759.6638108
2011	145099785.00531897