Year	current US$
1995	3233000000
1996	3085000000
1997	2876000000
1998	2648000000
1999	2598000000
2000	3205000000
2001	3745000000
2002	4428000000
2003	5225000000
2004	7431000000
2005	7181000000
2006	8482000000
2007	11198000000
2008	13749000000
2009	15182000000
2010	22688000000
2011	31118000000
2012	36593000000
2013	43755000000
2014	43412000000
2015	31620000000
2016	31155000000
2017	36595000000
2018	41478000000
2019	41166000000
2020	9442000000