Year	current US$
1970	823227.895133272
1971	884430.133588225
1972	1003774.83218086
1973	1295415.82773221
1974	1763198.10648284
1975	1634251.55897023
1976	1737583.30134246
1977	1989691.62000865
1978	2161374.96850351
1979	2567246.25237466
1980	3076743.75625846
1981	3304775.52736309
1982	3757747.44085653
1983	5466167.20283548
1984	5620021.37662925
1985	5388551.21930161
1986	6956151.4255243
1987	8974691.21514052
1988	9280055.61022024
1989	10107069.8596477
1990	11353380.8228342
1991	11930744.7680439
1992	13014312.9411434
1993	14604892.5157512
1994	17067782.6979701
1995	17002989.8142888
1996	20805689.0701475
1997	23668362.5615087
1998	27148922.7754169
1999	28882110.3596332
2000	29546797.6386318
2001	32131169.6653252
2002	36016629.7966081
2003	38334438.4866359
2004	46873355.7523181
2005	48964311.8867934
2006	51115537.7688928
2007	47618045.9835319
2008	43056862.6322144
2009	49981581.662522
2010	49662450.4990002
2011	51863037.35031
2012	55327119.0388637
2013	56900199.0761174
2014	66639973.3893898
2015	90937455.132945
2016	92377601.9919337
2017	113577832.640915
2018	95158505.0622018
2019	105042042.253053
2020	109803916.256414
2021	119951657.436621