Year	current US$
1970	54196.6267702081
1971	595818.884004046
1972	1870480.87676421
1973	5748897.53962457
1974	51982828.7561059
1975	64537417.7534905
1976	89000510.1920626
1977	116844955.530232
1978	143507058.9252
1979	391726985.59477
1980	539603999.319045
1981	438342930.709952
1982	281587160.893658
1983	358664408.08016
1984	365570641.572452
1985	384670277.046722
1986	145684632.000844
1987	214885069.536206
1988	152993293.127352
1989	226274904.583055
1990	269841267.030614
1991	102887922.866289
1992	92645931.4790112
1993	90919404.1853618
1994	81055158.2239525
1995	88372625.1503718
1996	113886767.78293
1997	89711424.9540596
1998	27164790.8915632
1999	80592005.5117499
2000	180807133.092331
2001	137777921.933457
2002	138944832.797484
2003	162804557.637844
2004	215889348.589647
2005	300695045.161996
2006	351323017.029074
2007	386546873.731969
2008	571699821.924051
2009	290088554.141018
2010	345585902.460686
2011	564329241.156764
2012	535064087.416972
2013	491667361.947759
2014	445510975.53619
2015	194915527.211239
2016	142193172.501673
2017	211947721.95012
2018	380997213.40977
2019	322187259.080121
2020	171669273.269748
2021	440654621.532118