Year	constant 2021 US$
1960	22949589843.75
1961	28642689453.125
1962	26994570312.5
1963	28602609375
1964	29646970703.125
1965	31532859375
1966	31673490234.375
1967	31785929687.5
1968	28181789062.5
1969	26621810546.875
1970	28302208984.375
1971	29090458984.375
1972	26634240234.375
1973	30328050781.25
1974	37036039062.5
1975	43325480468.75
1976	41027078125
1977	37080550781.25
1978	38991031250
1979	38909988281.25
1980	44670230468.75
1981	44699050781.25
1982	43068468750
1983	40240640625
1984	41565257812.5
1985	42374429687.5
1986	40558519531.25
1987	39074898437.5
1988	39468359375
1989	42070281250
1990	53109628112.79297
1991	55897747802.73438
1992	52034950927.73438
1993	50372600097.65625
1994	50723909912.10938
1995	43497851074.21875
1996	42449421630.85938
1997	39361218750
1998	44177251220.70313
1999	47208648437.5
2000	44480749511.71875
2001	49125351806.64063
2002	51440358642.57813
2003	48018509277.34375
2004	50974630859.375
2005	77213500000
2006	67690601562.5
2007	56747941406.25
2008	59308910156.25
2009	59336328125
2010	58895332031.25
2011	59445738281.25
2012	60198167968.75
2013	67649171875
2014	65489890625
2015	68276906250
2016	70251820312.5
2017	69897421875
2018	63907699218.75
2019	63635968750
2020	82064656250
2021	78008164062.5