Year	constant 2010 US$
1970	39374277546.8556
1971	43809541819.7635
1972	51390344373.1949
1973	59067165448.1844
1974	45058624669.0886
1975	44594218279.6731
1976	48413352481.4191
1977	44571129985.4543
1978	46657918587.7059
1979	43350287441.4829
1980	43724633630.0841
1981	39382068341.2772
1982	38027826190.1241
1983	34763936148.2062
1984	34042941194.7728
1985	37556243804.1196
1986	40452155490.222
1987	32096220411.9554
1988	37381538311.8805
1989	38150537691.9437
1990	38839939162.1849
1991	42648484325.5181
1992	39132666236.8015
1993	37415361728.5297
1994	37174594076.8542
1995	39204988950.6427
1996	42294104895.1347
1997	43502583671.9219
1998	50956294322.0869
1999	50720067724.5447
2000	56990957143.1441
2001	59535782712.7161
2002	60865478113.4391
2003	72189125768.4136
2004	71717244194.9244
2005	64087698848.2289
2006	79392524434.5015
2007	86165507005.3046
2008	78225944884.9281
2009	57196474840.5886
2010	51035883490.7074
2011	39897580694.5141
2012	30319138800.5044
2013	27312729454.9181
2014	29129027671.8466
2015	25490327760.3253
2016	27041254889.7815
2017	29732867746.2666
2018	30258566910.209