Year	constant 2015 US$
2000	7504.181307156026
2001	8780.807544453724
2002	9351.11575048241
2003	9997.865666426915
2004	10436.243642607358
2005	12153.903471327627
2006	14300.194968124426
2007	12200.118705298559
2008	15085.878740971151
2009	15938.361976684848
2010	14357.683411697051
2011	18143.46503528154
2012	15076.731853506595
2013	13943.942405092206
2014	7931.639240704959
2015	8902.443567733082
2016	8570.584136070132
2017	8830.53837753949
2018	7347.669683072282
2019	7404.372393322852
2020	7619.548502302958
2021	6531.6921762119955