Year	constant 2015 US$
1995	7549528128833.399
1996	7419347223313.594
1997	7546015658037.826
1998	6966983735454.883
1999	7015638600395.003
2000	7155838264596.356
2001	7360813562034.607
2002	8323114080275.508
2003	8178267903110.454
2004	9076691018264.223
2005	9484990386347.057
2006	10230065673580.445
2007	11622579019716.104
2008	11764632690231.537
2009	12374037985981.963
2010	13244313586570.027
2011	13612558517990.543
2012	14514331455772.326
2013	15205187610547.164
2014	16025975750887.992
2015	17021436625548.982
2016	17969006646568.35
2017	18909473679047.01
2018	19455613683237.94
2019	20016272342648.2
2020	19719341261459.32
2021	20657676954279.45