Year	current US$
1970	7787687.72211394
1971	9673564.83105345
1972	12237831.8694862
1973	16831271.2695424
1974	23366926.266137
1975	29407969.3393357
1976	32107848.1675393
1977	36928275.5613691
1978	40524660.2910057
1979	50320473.854254
1980	58270255.6799512
1981	67363093.845074
1982	70360492.6791078
1983	72254061.356932
1984	64407855.5087494
1985	63338271.8778529
1986	71808559.5370338
1987	65360298.7264605
1988	61322030.2092422
1989	54676092.091957
1990	58887214.6659464
1991	61382582.4979667
1992	67692071.3985362
1993	72234978.9049162
1994	79440103.6732466
1995	88183110.4478419
1996	95930907.2842584
1997	93736681.203851
1998	72951524.0064426
1999	89971424.5978886
2000	86390617.4488407
2001	86649927.1635784
2002	102177998.056063
2003	132780502.191898
2004	162772856.318523
2005	174820690.208667
2006	164109509.506207
2007	175848149.79019
2008	175093481.420595
2009	139159933.996596
2010	141130998.255335
2011	161550324.138701
2012	159996796.158957
2013	162472999.123361
2014	183191520.264955
2015	174307070.10303
2016	184341901.862634
2017	194996910.234724
2018	206515613.631776
2019	198978260.828894
2020	165953532.358687
2021	160021612.34987