Year	current US$
1960	379000000
1961	469000000
1962	537000000
1963	557000000
1964	579000000
1965	730000000
1966	829000000
1967	825000000
1968	646000000
1969	613000000
1970	623000000
1971	763000000
1972	796000000
1973	1019000000
1974	1531000000
1975	2550000000
1976	2037000000
1977	1911000000
1978	1175000000
1979	1820000000
1980	2573000000
1981	3160000000
1982	2940000000
1983	2234000000
1984	1881000000
1985	1767000000
1986	2391000000
1987	3003000000
1988	3109000000
1989	2009000000
1990	2634000000
1991	2813000000
1992	3964000000
1993	4231000000
1994	5626000000
1995	7584000000
1996	7947000000
1997	8558000000
1998	8220000000
1999	6823000000
2000	7415000000
2001	7316000000
2002	7493000000
2003	8414000000
2004	10101000000
2005	12502000000
2006	15312000000
2007	20368000000
2008	29953000000
2009	21814000000
2010	30030000000
2011	37747000000
2012	42545000000
2013	43670000000
2014	42346000000
2015	37924000000
2016	36254000000
2017	39885000000
2018	43262000000
2019	42284000000
2020	36140000000
2021	50891000000
2022	60979000000
2023	52306000000