Year	current US$
1995	6267000000
1996	5649000000
1997	5333000000
1998	5830000000
1999	5338000000
2000	4778000000
2001	4613000000
2002	6498000000
2003	7549000000
2004	9090000000
2005	10346000000
2006	11564000000
2007	13032000000
2008	14050000000
2009	11438000000
2010	13300000000
2011	13682000000
2012	12994000000
2013	11357000000
2014	8453000000
2015	7866000000
2016	7489000000
2017	7427000000
2018	8303000000
2019	8134000000