Year	constant 2015 US$
1975	10790513251.641794
1976	10872330951.222263
1977	10743310135.223045
1978	11188063924.99453
1979	12455190888.323044
1980	13374068383.593748
1981	13791245230.468748
1982	13916620187.109373
1983	14304949698.828121
1984	14941810098.046871
1985	15589765626.171873
1986	15942590725.390623
1987	16894552785.546873
1988	17651240576.953125
1989	18437885216.40625
1990	18389066649.21875
1991	16163383790.624998
1992	16361986598.046873
1993	17252925449.218746
1994	19458637075.781246
1995	20842199650.39062
1996	21590011338.67187
1997	23743575859.374996
1998	26243308401.95312
1999	28714193609.374996
2000	32792762995.312492
2001	33978832275.390614
2002	35107206885.156235
2003	36116863615.624985
2004	37884317650.39061
2005	39330012946.874985
2006	43824649666.79686
2007	48246058535.93748
2008	46986761405.0781
2009	36079140177.343735
2010	38817417991.406235
2011	38837389223.437485
2012	34339423964.843735
2013	34621240239.062485
2014	34313905168.359356
2015	34440389637.89061
2016	36129068257.42186
2017	38814089452.73436
2018	37144272552.343735
2019	38315918164.843735
2020	37371722694.92186
2021	37487112035.54686
2022	36772585733.98436
2023	35774024132.42186