Year	constant 2010 US$
1968	13470458420.987
1969	13907465553.212
1970	14539470473.9431
1971	15320902259.1975
1972	15893183620.0118
1973	16595465246.3895
1974	19269553452.7735
1975	21676448411.2358
1976	25399400712.0653
1977	25881979812.2088
1978	30296659549.7506
1979	36619346782.51
1980	45683999963.121
1981	45351087832.7059
1982	46908434203.177
1983	40775947874.5009
1984	40170326340.0621
1985	40754361372.6313
1986	42648457381.0555
1987	46617016427.9371
1988	46608141930.7714
1989	45154650456.9052
1990	71262089056.6554
1991	25620782930.7993
1992	33971161752.0081
1993	44260969488.2902
1994	45967022407.6695
1995	46941533227.6609
1996	52114859810.4336
1997	63182980052.1758
1998	85206731247.0945
1999	100188005737.685
2000	101597124725.723
2001	103939260178.576
2002	96767263419.0948
2003	64736488915.1087
2004	99796330468.1736
2005	104187985160.487
2006	114771608149.415
2007	116352699697.206
2008	125926324446.493
2009	130181751588.159
2010	138516722649.573
2011	148969847232.097
2012	169730925971.545
2013	182630476345.383
2014	183908889679.791
2015	188465535167.112
2016	214044490029.269
2017	210467191959.376
2018	211798303075.976