Year	current US$
1970	22659994.129
1971	22638212.209
1972	30732321.74
1973	28418270.11
1974	109083804.87200001
1975	362107662.211239
1976	419619361.9414
1977	603376113.9954957
1978	716751265.420276
1979	936740654.510572
1980	1397703775.3731441
1981	1535195728.234267
1982	1686019494.213651
1983	1891603800.990925
1984	1673439422.9177287
1985	1502909701.881667
1986	1541440766.922546
1987	1995964556.3059993
1988	2096648601.0362182
1989	2374864403.3963685
1990	2362992086.5548034
1991	2370716821.859224
1992	2692105789.680382
1993	3140957111.9445987
1994	3118771089.315273
1995	3052292001.044755
1996	2816482616.3381634
1997	3654349687.063602
1998	3705134895.6033964
1999	4778789772.226677
2000	4801332850.70784
2001	4084194705.9350185
2002	4629191186.864178
2003	5515571692.6627655
2004	7813140006.884528
2005	20122941008.91369
2006	23295636860.956093
2007	25737142480.70778
2008	28435038502.51694
2009	28413222640.875412
2010	31657063532.351006
2011	37060672724.90126
2012	37231343159.57172
2013	37550414098.68017
2014	39694361709.19806
2015	42185847790.9083
2016	38570387839.91705
2017	42276612915.95749
2018	49521252286.90908
2019	49990186684.114105
2020	43079893799.76207
2021	49963882713.634155
2022	53565035134.95168