Year	constant 2015 US$
1998	10279329480.904531
1999	10210134111.149292
2000	10337984597.91834
2001	10910574193.029373
2002	10978028262.934753
2003	12496631476.985754
2004	13268399543.887106
2005	13637963896.911318
2006	14313372961.425064
2007	17074496956.79558
2008	18035110725.919785
2009	20280383442.679234
2010	21483892549.60359
2011	23006175096.10474
2012	25520967918.317703
2013	26307898920.074627
2014	27370309524.564083
2015	28385955786.73602
2016	29829737665.64251
2017	32603346934.13004
2018	32910271525.662285
2019	31656503382.494232
2020	34677452482.62619
2021	37022718651.2052