Year	current US$
1991	6367102437.3909
1992	7173060635.15719
1993	7330662468.29225
1994	7836749047.88011
1995	9086481622.42194
1996	9418560502.80099
1997	9177483766.68973
1998	9194707739.36938
1999	9509415726.04853
2000	8996350546.38974
2001	9757022557.04255
2002	11422575452.9277
2003	13998997800.0553
2004	16455546794.5313
2005	17727541244.4867
2006	18407543135.9483
2007	22476688999.7007
2008	25628170509.5065
2009	23392943714.0117
2010	23704598590.2573
2011	25350292206.7528
2012	23482404068.5589
2013	24145242403.0194
2014	23940520633.0237
2015	20718942478.8688
2016	21284978150.8001
2017	23183521191.9706
2018	25317574498.0763
2019	25945104249.2007
2020	27390124348.3335
2021	31866904538.2758