Year	current US$
1970	10463349.4242397
1971	14097217.0174203
1972	16193684.4746262
1973	49080724.981894
1974	107862157.812307
1975	57155121.1431767
1976	68495481.4838966
1977	109421587.853028
1978	130602544.720288
1979	214145190.186273
1980	249431373.736901
1981	168772914.294514
1982	112371954.498632
1983	117494814.741198
1984	117677095.022675
1985	114604827.288347
1986	73451790.6474319
1987	114372103.907658
1988	513504185.889497
1989	570623506.524837
1990	419098267.811242
1991	213607720.483253
1992	173189977.420647
1993	121803045.432412
1994	185936941.749923
1995	884632077.359955
1996	911751557.583689
1997	675847392.37277
1998	818139742.280369
1999	958170197.850636
2000	1157778412.00394
2001	1125963096.72775
2002	1178824175.29688
2003	1465818415.37798
2004	1577694165.36603
2005	2944133232.31537
2006	3869650155.80742
2007	7385185272.47865
2008	2875730806.07555
2009	4839270514.91541
2010	6989862808.43735
2011	8308001306.42864
2012	3104614330.35386
2013	3674437018.80533
2014	1338667141.16645
2015	1084026205.63439
2016	1736092380.2605
2017	2024807659.62629
2018	3875547505.68172
2019	3748193943.40168
2020	3021770517.32956
2021	14483011521.5155