Year	current US$
1976	738001666.347842
1977	1094675042.84284
1978	1477793904.59249
1979	1356149786.70161
1980	2181702881.21218
1981	2833532974.11666
1982	3127644715.35767
1983	3276461637.71425
1984	2946660775.6583
1985	2162560857.12487
1986	3571636094.28321
1987	4223804156.15193
1988	3769007826.86984
1989	3904060997.34797
1990	4167865118.71354
1991	6172278485.84068
1992	6261114146.44011
1993	3975547259.4118
1994	5588839609.8676
1995	5296065252.14753
1996	4516843978.88631
1997	4623485207.06134
1998	5303678257.84813
1999	5165597573.13859
2000	8201587016.07312
2001	9252959223.10355
2002	9958761959.89048
2003	12060950876.734
2004	15314304885.5458
2005	14102293915.7981
2006	13676673556.4545
2007	14483267977.8498
2008	9320825859.78086
2009	14972359092.4202
2010	17980386593.5102
2011	22512770317.4102
2012	20320653226.2319
2013	23230816798.1823
2014	26662051619.1867
2015	30896541666.9662
2016	30966219530.9289
2017	28731781237.9076
2018	26566475846.0003
2019	22872393717.8656
2020	30918129882.3597
2021	34760437857.0432