Year	current US$
1971	1253758554.35069
1972	1617556096.70299
1973	1641081935.76239
1974	2101450421.76384
1975	2491082666.94375
1976	2457103833.60425
1977	2660209334.54055
1978	2088632692.61711
1979	1861394607.50534
1980	1995825406.09592
1981	2308852835.18778
1982	2584917440.97615
1983	2929250962.83445
1984	1742324883.95936
1985	1479837222.11339
1986	2088912689.3485
1987	2551530518.98491
1988	3082066668.14191
1989	3598622013.08905
1990	3722723302.42195
1991	3265948413.16461
1992	2922367755.63082
1993	4808909556.14182
1994	4661903091.94227
1995	5690705138.58239
1996	6547354305.83221
1997	7481701851.6843
1998	7795385679.33416
1999	7800175190.18893
2000	7918473625.70209
2001	8023862035.9122
2002	8358378305.81864
2003	8106078283.42148
2004	8781081413.59465
2005	9645236470.37796
2006	10257523788.7039
2007	10984445640.9712
2008	11892468403.7785
2009	10399621099.9765
2010	11615846096.6961
2011	12695036023.366
2012	13366437703.6091
2013	12729201460.5512
2014	12433969229.0538
2015	12617329169.7042
2016	12366002304.3756
2017	13240977878.3248
2018	13911271153.7676
2019	14183306140.1421
2020	12402225278.4665
2021	13302280442.2294