Year	current US$
1960	21000000
1961	17000000
1962	19000000
1963	18000000
1964	17000000
1965	18000000
1966	20000000
1967	20000000
1968	23000000
1969	21000000
1970	22000000
1971	30000000
1972	32000000
1973	31000000
1974	43000000
1975	62000000
1976	58000000
1977	74000000
1978	98000000
1979	152000000
1980	168000000
1981	161000000
1982	213000000
1983	182000000
1984	186000000
1985	189000000
1986	202000000
1987	212000000
1988	204000000
1989	187000000
1990	231000000
1991	255000000
1992	221000000
1993	196000000
1994	224000000
1995	234000000
1996	127000000
1997	121000000
1998	158000000
1999	118000000
2000	148000000
2001	139000000
2002	129000000
2003	157000000
2004	176000000
2005	269000000
2006	431000000
2007	319000000
2008	403000000
2009	402000000
2010	509000000
2011	752000000
2012	751000000
2013	811000000
2014	769000000
2015	857000000
2016	616000000
2017	755000000
2018	793000000
2019	887000000
2020	909000000
2021	1025000000
2022	1260000000
2023	1151000000