Year	constant 2010 US$
1990	8642035247.71152
1991	9022283990.73237
1992	7344139242.09128
1993	6785984043.51889
1994	5856304821.93776
1995	4122838534.20778
1996	3995030127.96775
1997	4861951614.59158
1998	5353009813.87075
1999	5138890407.74919
2000	5257083868.39194
2001	5137732477.50987
2002	5481907638.39219
2003	6611267783.42494
2004	7926532825.16708
2005	9472465906.63783
2006	12465800325.1838
2007	14510161547.5259
2008	17963569219.9221
2009	18861756646.5198
2010	22217824773.4139
2011	25285925381.1794
2012	22392192946.6714
2013	24400962704.8266
2014	22975568540.4071
2015	19423033704.6645
2016	16606684763.5251
2017	17526670400.5562
2018	18376970558.3645