Year	constant 2015 US$
1995	13549277092.452583
1996	13221912720.519966
1997	12075872131.582441
1998	10682318609.895214
1999	9455896007.428043
2000	9442896935.93315
2001	10208250431.091658
2002	10420745456.957157
2003	10730335588.274307
2004	11630189680.328957
2005	11430693725.95835
2006	10810187027.457222
2007	11369147101.737629
2008	11207321925.984877
2009	12471680594.243267
2010	12863509749.30362
2011	12962727152.142193
2012	11779281071.76018
2013	12825308396.339035
2014	13056638811.513462
2015	11942432683.379759
2016	11994959543.706062
2017	12175885395.941107
2018	11001989653.80024
2019	10759782464.517841
2020	12401379493.301498
2021	10973338639.076801
2022	11089269133.837381
2023	10991378166.865635