Year	current US$
1970	29362094.3395883
1971	29257156.0374177
1972	38020500.5414572
1973	60529109.7369802
1974	68462993.6913617
1975	88079680.1604878
1976	85912147.1829184
1977	80802372.2395208
1978	121258178.916118
1979	148516053.590951
1980	160580819.61506
1981	111741928.939472
1982	114309274.605541
1983	114422031.616052
1984	97227109.7527876
1985	119595340.180959
1986	149618545.942669
1987	150434811.955182
1988	161430610.857731
1989	184787971.162313
1990	192503670.784342
1991	158771921.153714
1992	160341979.726734
1993	181718316.889526
1994	166425070.263316
1995	172839369.931467
1996	175420684.572241
1997	139996080.950545
1998	131256859.717862
1999	134328046.97987
2000	176735317.20906
2001	139516890.109281
2002	153357298.65801
2003	184888155.228713
2004	166063051.503888
2005	169463947.895664
2006	206982986.548688
2007	267707764.156175
2008	292651620.587906
2009	257824023.367568
2010	243295946.205671
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	218711672.882097
2021	230658078.521693