Year	current US$
1971	18177015.3
1972	17820796.97
1973	19522953.03
1974	22210059.163999997
1975	194648131.411139
1976	274479038.485
1977	359278000.5844
1978	370322563.32989997
1979	419694794.830855
1980	549313413.4280471
1981	553666953.2495579
1982	1052896445.9337579
1983	1142609866.9702861
1984	1015006748.675228
1985	798433754.8366569
1986	853114651.89417
1987	1252572592.9691234
1988	1217434301.4046848
1989	1270890649.942176
1990	1489953341.2732477
1991	1498748150.2275198
1992	1639702313.39044
1993	1489955386.5797698
1994	1690451786.2444499
1995	1611821177.8579721
1996	1443067248.1912131
1997	1378798580.9020944
1998	1128307070.2215748
1999	1016945850.6129453
2000	963327180.829546
2001	734559863.6363963
2002	711099919.9297657
2003	1076590780.8354294
2004	1721369597.4966848
2005	1800601683.8197985
2006	1957369497.444544
2007	2283697515.2645392
2008	3229412524.9653115
2009	2876187053.8514214
2010	3380203148.3018804
2011	4118133253.2689114
2012	4129605952.9518256
2013	3701465688.5140405
2014	4093076128.5456314
2015	3650435517.8227696
2016	3784298538.133654
2017	4509329348.797679
2018	4683524044.632401
2019	4882619897.397652
2020	5096342068.826388
2021	6063276864.984948
2022	6034764587.580285