Year	current US$
1970	3833883.19037119
1971	2730871.37796738
1972	4600238.71319716
1973	16309748.8095437
1974	26371453.3320278
1975	8388330.67248564
1976	9225487.67166222
1977	8685891.75743001
1978	6033080.21848776
1979	15860748.9744644
1980	29323374.640816
1981	9865415.64833037
1982	5654392.24329349
1983	8213567.82475438
1984	9799508.35906718
1985	7313058.83995161
1986	3931100.9219397
1987	4551052.3017955
1988	99450631.4993104
1989	97368495.3910405
1990	36686789.7550459
1991	14177642.0062137
1992	10760394.2071418
1993	3805190.00352927
1994	7896121.57715813
1995	9957693.02365396
1996	10069058.7757994
1997	7172462.16031357
1998	25782271.7681416
1999	38095453.2604205
2000	3365481.48152917
2001	1750935.57865965
2002	114046921.676313
2003	140569171.305655
2004	219661907.927595
2005	245244599.913283
2006	756205831.899753
2007	711363111.951096
2008	668765210.787664
2009	620348261.130101
2010	1358352626.73933
2011	1740070265.14583
2012	1486828562.08238
2013	816022039.10959
2014	775311954.449641
2015	300812988.33018
2016	516564323.599132
2017	451511814.694711
2018	640322873.531936
2019	562063844.13316
2020	653162392.051905
2021	2183101953.54608