Year	constant 2015 US$
1968	3152211189.741262
1969	3157601173.5040073
1970	3444571343.0696344
1971	3581179552.0355115
1972	4316261819.443548
1973	3289191121.625973
1974	3920005082.6446023
1975	3367067093.8072214
1976	4131329618.148155
1977	4027618896.2127695
1978	4076314611.6126614
1979	4017954097.746866
1980	3996765885.766263
1981	4073154965.9690895
1982	4515877079.897212
1983	4342654153.651708
1984	4818831339.367428
1985	5576588710.7344885
1986	5337013225.973978
1987	4891689050.704764
1988	5267872744.582693
1989	5780107062.972477
1990	6408133101.266368
1991	5347607331.964281
1992	6564442630.234429
1993	6491027334.291529
1994	6953079045.151457
1995	7784251712.612961
1996	8360608251.550118
1997	7683143051.867125
1998	8317488381.44816
1999	9643052662.346062
2000	8539471850.7806425
2001	8627031591.906916
2002	10100858075.823328
2003	7151129286.009672
2004	8404818319.170309
2005	11042194396.071613
2006	11513439173.412653
2007	8326038010.854475
2008	7168524789.380929
2009	7423697684.085751
2010	8426989213.274513
2011	9798183288.094341
2012	9122162263.889248
2013	11303779486.387096
2014	11076227238.310541
2015	6990950630.208723
2016	6969370901.351068
2017	5854404453.385758
2018	8059369444.969789
2019	11779564006.689133
2020	14424679786.906755
2021	11459260795.572498
2022	7647139507.6179905
2023	9854381417.38438