Year	constant 2010 US$
1991	15571888156.8369
1992	15160872139.5567
1993	15468799161.153
1994	17397802180.2326
1995	16647890759.2983
1996	17415990801.5372
1997	18935329976.3959
1998	21215424457.0457
1999	22907777334.4607
2000	24092956266.626
2001	24738451398.5725
2002	26667844551.2216
2003	27003817130.8804
2004	29060994102.7439
2005	30097914851.9835
2006	30308965197.8696
2007	31591224820.6048
2008	31911290351.4965
2009	29277548792.0235
2010	26503123835.3243
2011	26149431869.4521
2012	25376209028.0644
2013	27874507818.2044
2014	31303820640.6367
2015	32770007267.4956
2016	28925220287.8176
2017	34187771379.4969
2018	39812391588.1266