Year	current US$
2000	12541807491.4965
2001	12477013838.0579
2002	12805060496.9626
2003	14719043112.1999
2004	15919161238.6324
2005	18519524822.2963
2006	20741441356.8397
2007	25821207881.0907
2008	31652073055.7146
2009	35279128908.7168
2010	40359889907.4634
2011	48591261656.522
2012	53304122299.0234
2013	55726932443.8196
2014	57926540827.621
2015	54192494661.8062
2016	55633329643.2144
2017	58912514109.5297