Year	constant 2015 US$
1989	6426171833.003025
1990	6311319005.748035
1991	5880816867.022906
1992	5920093535.887982
1993	5767421558.794144
1994	5862570390.339627
1995	7232488260.447125
1996	8191346545.856062
1997	8979276621.916977
1998	9701216189.348278
1999	10709078670.720331
2000	11176693027.385382
2001	10881849690.519117
2002	12064987428.908104
2003	11806094337.279402
2004	11469851191.903658
2005	12010841792.847612
2006	11641593928.158266
2007	12156148616.942636
2008	11771531030.967823
2009	10646289244.289324
2010	10341013698.527552
2011	10145533160.463526
2012	10142970493.894648
2013	9861381836.164473
2014	10118191100.50065
2015	10367560246.349
2016	10396509761.897404
2017	10988845417.84296
2018	10801256212.626581
2019	11030375351.980844
2020	8128008331.014015
2021	9194932514.484396