Year	current US$
1995	11354000000
1996	10779000000
1997	10036000000
1998	10188000000
1999	9135000000
2000	9058000000
2001	9392000000
2002	9198000000
2003	10427000000
2004	11217000000
2005	11914000000
2006	12961000000
2007	14934000000
2008	18016000000
2009	17023000000
2010	17883000000
2011	20809000000
2012	19564000000
2013	20236000000
2014	21358000000
2015	20140000000
2016	19787000000
2017	20399000000
2018	21294000000
2019	21257000000
2020	9994000000