Year	constant 2010 US$
1997	253926259.692876
1998	249888832.164444
1999	261358729.621057
2000	245075684.019568
2001	229807096.899573
2002	215489765.840967
2003	202064426.353172
2004	189475505.859418
2005	185350775.276194
2006	197213224.893871
2007	203129621.640687
2008	188910548.177469
2009	190421832.571149
2010	187887952.719496
2011	186009073.078716
2012	181544855.383684
2013	199699340.909145
2014	215675288.156062
2015	201397483.021209
2016	203831302.495943