Year	constant 2015 US$
1981	63634658263.025604
1982	55952589484.810394
1983	41370046129.03834
1984	38789572565.925026
1985	40844162553.66399
1986	37686770270.44009
1987	43111209344.81017
1988	48879972037.50775
1989	42258981187.92934
1990	44827409261.85325
1991	48306240790.367966
1992	53594429186.16162
1993	44780839523.70079
1994	39899887720.79127
1995	35427290249.569626
1996	36709322208.90005
1997	37430145341.20643
1998	36208885590.43177
1999	37098043795.386986
2000	37597196601.146996
2001	39113409083.71998
2002	44983704394.49768
2003	41744812060.84125
2004	41909561112.38113
2005	44700236834.735825
2006	45169160640.43639
2007	46602038952.92268
2008	48533730275.40838
2009	50081612608.28335
2010	51185811107.46354
2011	57176208281.722725
2012	62405764613.121056
2013	71054994373.17528
2014	77918731989.96109
2015	78194377800.63249
2016	77934380226.67357
2017	79372526487.0837
2018	82564994322.42484
2019	85093007080.67613
2020	81905116728.92155
2021	85633627278.85687
2022	87540628463.2641
2023	89612118472.3556