Year	current US$
1995	15389535124.42854
1996	14173774829.245964
1997	15111737313.203049
1998	13852783629.368732
1999	11594826827.445911
2000	14258085275.438961
2001	15430260299.205225
2002	17838605343.485683
2003	20722780003.65376
2004	26537520981.695583
2005	29889878113.347446
2006	31596451213.326225
2007	37854525797.98881
2008	43620370177.12853
2009	39609699004.51392
2010	46149895489.73551
2011	55287330496.86609
2012	67917520084.401695
2013	82258330343.29884
2014	79809192226.46593
2015	62731857719.828575
2016	51556892789.086624
2017	63423061847.22263
2018	69698653510.46223
2019	72724716986.63545