Year	constant 2021 US$
1966	14399999.6185303
1967	4750000
1968	7250000
1969	10949999.8092651
1970	18409999.8474121
1971	33580001.8310547
1972	31010000.2288818
1973	25790000.915527303
1974	17579999.9237061
1975	17680000.3051758
1976	21659999.8474121
1977	17069999.6948242
1978	30299999.237060502
1979	19520000.4577637
1980	17879999.1607666
1981	27420000.0762939
1982	22719999.3133545
1983	40119998.9318848
1984	14670000.076293899
1985	16280000.6866455
1986	10819999.6948242
1987	10060000.4196167
1988	3519999.98092651
1989	1879999.99523163
1990	3529999.97138977
1991	3579999.92370605
1992	1720000.02861023
1993	8010000.22888184
1994	4280000.20980835
1995	460000.00834465
1996	7699999.80926514
1997	8739999.77111816
1998	25989999.7711182
1999	-1009999.99046326
2000	3200000.04768372
2001	-280000.001192093
2002	7280000.20980835
2003	28889999.3896484
2004	36919998.1689453
2005	-819999.992847443
2006	-639999.985694885
2007	19829999.9237061
2008	9319999.69482422
2009	12239999.7711182
2010	15939999.5803833