Year	constant 2010 US$
1970	17485273645.2408
1971	16867547907.4939
1972	19379978849.5202
1973	23467350987.9165
1974	21463635452.8176
1975	11739385551.3378
1976	15220452199.1887
1977	20394814056.3256
1978	21734604087.8119
1979	23357611826.3187
1980	25856020159.5293
1981	26790122954.5235
1982	27135623708.237
1983	21955138507.0689
1984	17478068908.6412
1985	17129788585.3214
1986	20200427219.3391
1987	25980623866.5696
1988	31639231726.5921
1989	32268853974.575
1990	35702071021.0151
1991	35629757445.7026
1992	36764438762.0165
1993	33563276508.5239
1994	37640063184.4534
1995	39904628884.1431
1996	41447817798.8287
1997	47111693822.0109
1998	53437777437.8435
1999	57735583802.1507
2000	58683278238.2426
2001	59633414780.5894
2002	56429217608.4552
2003	51799041629.1487
2004	53928144003.4688
2005	53575523408.7634
2006	53566897167.3948
2007	54936938377.8867
2008	55367783454.253
2009	48587588200.3035
2010	50236026212.7951
2011	43202797282.5109
2012	35380195218.3102
2013	33564113279.8954
2014	35269386848.8489
2015	37521919357.6986
2016	38193772468.7791
2017	41714367094.2972
2018	43994344724.0572