Year	current US$
1960	2933999999.9999995
1961	2936999999.9999995
1962	2982999999.9999995
1963	4156999999.9999995
1964	4913000000
1965	5086000000
1966	5368000000
1967	6113000000
1968	7222000000.000001
1969	8068000000
1970	8739000000
1971	10920000000
1972	9634000000
1973	14326000000.000002
1974	34702000000.00001
1975	33938000000.000004
1976	38443000000
1977	42269000000
1978	42429000000
1979	64021000000
1980	85826000000
1981	64259000000
1982	67873000000
1983	64839000000
1984	60464000000
1985	60100000000
1986	40445000000
1987	50186000000.00001
1988	50133000000.00001
1989	61209000000.00001
1990	72587000000.00002
1991	60129000000.000015
1992	58384000000.000015
1993	53607000000.000015
1994	57296000000.000015
1995	61827000000.000015
1996	71462000000.00002
1997	71975000000.00002
1998	58385000000.00001
1999	79944000000.00002
2000	113105000000.00002
2001	98968000000.00002
2002	103291000000
2003	118111000000
2004	155077000000
2005	210391000000.00003
2006	265271000000.00003
2007	314024000000
2008	417533000000
2009	282302000000
2010	351789999999.99994
2011	409028000000
2012	427228000000
2013	384923000000
2014	349166000000
2015	246484000000
2016	234223000000
2017	293176000000
2018	358139000000
2019	312580000000
2020	216172000000
2021	351727000000
2022	477667000000
2023	422233000000