Year	current US$
1995	4539000000
1996	5057000000
1997	4681000000
1998	5288000000
1999	5908000000
2000	5969000000
2001	6584000000
2002	7372000000
2003	9172000000
2004	12295000000
2005	15169000000
2006	16830000000
2007	19866000000
2008	20543000000
2009	17146000000
2010	16926000000
2011	17387000000
2012	15395000000
2013	16433000000
2014	17976000000
2015	17429000000
2016	18803000000
2017	22346000000
2018	26329000000
2019	27858000000
2020	8742000000