Year	constant 2015 US$
1981	22066587211600.367
1982	22308969000475.523
1983	23258612698418.19
1984	24589218685886.637
1985	25936341796703.703
1986	26867590834797.836
1987	27588118393705.32
1988	28321632065937.01
1989	29205217862673.973
1990	30292797398829.51
1991	30649440836221.94
1992	31418639254262.273
1993	31922094867275.08
1994	33349074889024.582
1995	34343428549180.625
1996	35233442471666.74
1997	36613341807556.445
1998	37327352358257.4
1999	38396168992172.47
2000	39718469819942.99
2001	40507662399616.62
2002	41957621150255.95
2003	42580955771238.17
2004	44835320129510.48
2005	46364612003879.38
2006	48741054102997.72
2007	51171236541869.56
2008	51024841943843.57
2009	50674410978164.31
2010	53266201672735.02
2011	54628170297326.02
2012	56346436203007.234
2013	57707392587925.82
2014	59648856211369.086
2015	61631628380470.48
2016	63366253290302.17
2017	65723028411397.414
2018	67401763692046.805
2019	68897970212308.555
2020	66168369816495.04
2021	69692698073400.76