Year	current US$
1995	20487000000
1996	21389000000
1997	22586000000
1998	23689000000
1999	23023000000
2000	22506000000
2001	20897000000
2002	22651000000
2003	24964000000
2004	30758000000
2005	32780000000
2006	38352000000
2007	43045000000
2008	39326000000
2009	33480000000
2010	35168000000
2011	39067000000
2012	41189000000
2013	46582000000
2014	52659000000
2015	51947000000
2016	48757000000
2017	48188000000
2018	49940000000
2019	52529000000
2020	19098000000