Year	current US$
1995	11064000000
1996	13882000000
1997	12712000000
1998	11179000000
1999	10020000000
2000	9284000000
2001	9785000000
2002	10739000000
2003	12241000000
2004	15245000000.000002
2005	16768000000.000002
2006	19616000000
2007	23889000000
2008	30691000000
2009	24824000000
2010	23862000000
2011	25447000000
2012	24479000000
2013	25796000000
2014	27100000000
2015	24363000000
2016	26255000000.000004
2017	31116000000.000008
2018	34993000000.00001
2019	35383000000.00001