Year	current US$
1995	2954000000
1996	3583000000
1997	4046000000
1998	2942000000
1999	4361000000
2000	4657000000
2001	4119000000
2002	4133000000
2003	4704000000
2004	6328000000
2005	7206000000
2006	8133000000
2007	10327000000
2008	12104000000
2009	11757000000
2010	13633000000
2011	9333000000
2012	10823000000
2013	6747000000
2014	7979000000
2015	6897000000
2016	3306000000
2017	8636000000
2018	12704000000
2019	14256000000
2020	4874000000