Year	constant 2010 US$
1976	5306659433.75157
1977	6732075068.53506
1978	7192511373.50289
1979	9649124661.53066
1980	10362442289.5039
1981	12559553121.1067
1982	11590963075.8519
1983	10542017041.9206
1984	11718230020.0145
1985	10851460674.6391
1986	8714077887.01916
1987	11351386146.2013
1988	12435795160.2136
1989	13632302152.9787
1990	12590594634.7176
1991	9219151316.99551
1992	11279574106.608
1993	11839574754.0601
1994	11923478555.0784
1995	12147787893.4753
1996	12492871178.5541
1997	12084447969.1811
1998	11935203770.0603
1999	11925690259.0403
2000	13636402503.0204
2001	13809205853.5075
2002	14284572325.0901
2003	14331930203.1992
2004	17274049398.4761
2005	20245426688.0702
2006	20948263961.1216
2007	22298948386.6513
2008	22987818842.3732
2009	19482035670.8483
2010	18267136812.4119
2011	19109055198.4907
2012	20014012072.1534
2013	19880319889.3083
2014	19615140482.6991
2015	18129323652.1222
2016	16816153426.9228
2017	17775222057.9593
2018	17636084613.3164