Year	constant 2010 US$
1990	27555169062.8995
1991	27743175188.4602
1992	24358230189.1664
1993	22796422267.3
1994	18762217095.4646
1995	15912949053.1004
1996	16608716655.7297
1997	18509341520.9948
1998	20396090088.9071
1999	20734093940.1005
2000	22588553437.269
2001	25060395921.8806
2002	26808107651.6277
2003	29458273686.605
2004	33190399112.2058
2005	37274118658.4123
2006	43439410969.6625
2007	49025286746.6308
2008	58203636966.0071
2009	57576623583.9317
2010	64273917421.9537
2011	66544060139.7333
2012	68342053129.4988
2013	74131933119.3298
2014	74278931713.5552
2015	68903524769.6751
2016	65306740439.2398
2017	68451715658.0898
2018	72401949485.1456