Year	current US$
1995	2248000000
1996	2492000000
1997	2377000000
1998	2517000000
1999	2270000000
2000	2495000000
2001	2842000000
2002	3021000000
2003	3348000000
2004	3701000000
2005	4532000000
2006	5573000000
2007	6636000000
2008	7570000000
2009	6189000000
2010	6434000000
2011	8064000000
2012	9249000000
2013	9653000000
2014	11268000000
2015	12381000000
2016	12337000000
2017	12548000000
2018	14318000000
2019	15839000000
2020	6696000000