Year	current US$
1970	848625774.384712
1971	881763760.140118
1972	961620826.056025
1973	1075322282.93688
1974	1211318723.78062
1975	1283701948.9312
1976	1415171329.15096
1977	1609634769.37722
1978	1852548015.17092
1979	2385350830.74992
1980	2587021808.36741
1981	2876004649.25433
1982	3026358514.11458
1983	2975093628.40073
1984	3295472720.42707
1985	3464715247.15759
1986	3350060880.23946
1987	3540560758.48324
1988	3626432840.56582
1989	3794522683.81721
1990	3866094169.65363
1991	4082869859.52351
1992	4876580558.12995
1993	5535915230.89925
1994	6548598874.15399
1995	7637982738.47356
1996	8298695193.50798
1997	8071846170.48511
1998	6664802674.90769
1999	7311893182.14355
2000	6869053166.20706
2001	6861469724.59135
2002	7379081139.07272
2003	7743564579.44788
2004	10880676975.996
2005	12469939639.7602
2006	14724063769.0361
2007	17915877086.6155
2008	20572803357.7717
2009	19357218141.1186
2010	22920559997.6498
2011	24349714054.1908
2012	26128962115.5493
2013	28440281526.3886
2014	29627819851.0883
2015	28881573203.8909
2016	29299567961.8876
2017	29661982964.8743
2018	31773921501.9694
2019	37165815061.3802
2020	36804763672.806
2021	41320683070.2104