Year	constant 2010 US$
1980	28137987876.6731
1981	29668336590.3423
1982	30415464303.7223
1983	31563393207.2565
1984	32721614826.1178
1985	33551312360.1311
1986	34870752047.3952
1987	36807305849.6009
1988	40559146921.2519
1989	38844834721.4646
1990	33228829316.6833
1991	29908756703.3819
1992	30341906881.5633
1993	29873552285.7195
1994	30358660605.7367
1995	31107829745.3037
1996	31084168890.1116
1997	30802014220.4945
1998	33116246323.1084
1999	30468007494.7342
2000	31591786718.2755
2001	33587856158.0308
2002	36213304683.9405
2003	37926039963.1096
2004	40201939370.1518
2005	42705438427.5662
2006	44435473566.5864
2007	45398765248.0167
2008	49655857384.5862
2009	49016539715.2583
2010	49555731690.8082
2011	49923322437.1359
2012	50899268509.103
2013	50700405177.8436
2014	52340816935.0225
2015	53515521441.5185
2016	56632766231.7171
2017	59757881772.5154
2018	61746641613.6712