Year	current US$
1995	5500000000
1996	6240000000
1997	5750000000
1998	4430000000
1999	3600000000
2000	3315000000
2001	3496000000
2002	3278000000
2003	3085000000
2004	4769000000
2005	5540000000
2006	7215000000
2007	7751000000
2008	9898000000
2009	7366000000
2010	8358000000
2011	8251000000
2012	8540000000
2013	8605000000
2014	8507000000
2015	7701000000
2016	7876000000
2017	8729000000
2018	9481000000
2019	9220000000
2020	5202000000