Year	current US$
2002	2497000000
2003	3051000000
2004	3824000000
2005	3770000000
2006	3819000000
2007	4351000000
2008	4918000000
2009	4546000000
2010	4519000000
2011	5358000000
2012	5395000000
2013	5629000000
2014	6033000000
2015	6182000000
2016	5606000000
2017	5472000000
2018	5642000000
2019	5645000000
2020	4454000000