Year	constant 2010 US$
1975	1640754528.53132
1976	2288296098.27372
1977	2919264441.70617
1978	3083221576.3862
1979	3600544553.08582
1980	3808894558.14662
1981	3904190716.17559
1982	4403756430.85963
1983	4646436781.91686
1984	5407031771.70381
1985	5161392114.19246
1986	4596124729.3115
1987	5249585338.94939
1988	5944479512.51395
1989	7138347311.74516
1990	7546760495.21817
1991	7695919205.29801
1992	9114710993.37748
1993	7438442251.65563
1994	7967010993.37748
1995	9431721854.30463
1996	9986145695.36424
1997	10090132450.3311
1998	10194503311.2583
1999	10491006622.5166
2000	11474066225.1656
2001	11508251655.6291
2002	11393509933.7748
2003	11336701986.755
2004	12175960264.9007
2005	12298000000
2006	12999284768.2119
2007	14248357615.894
2008	16093629139.0728
2009	13624834437.0861
2010	14692649006.6225
2011	14223735099.3377
2012	13561735099.3377
2013	13014490066.2252
2014	13487509933.7748
2015	14624529801.3245
2016	15586172185.4305
2017	17490331125.8278
2018	17840264900.6622