Year	current US$
1995	3587000000
1996	3963000000
1997	4554000000
1998	4834000000
1999	5192000000
2000	6365000000
2001	6685000000
2002	7087000000
2003	7252000000
2004	8034000000
2005	8951000000
2006	9387000000
2007	9918000000
2008	10246000000
2009	8737000000
2010	9001000000
2011	9704000000
2012	10735000000
2013	11970000000
2014	12556000000
2015	12668000000
2016	12823000000
2017	13647000000
2018	14074000000
2019	12300000000
2020	4286000000