Year	current US$
1960	51000000
1961	58000000
1962	60000000
1963	67000000
1964	96000000
1965	129000000
1966	127000000
1967	150000000
1968	152000000
1969	172000000
1970	190000000
1971	181000000
1972	201000000
1973	261000000
1974	557000000
1975	444000000
1976	568000000
1977	632000000
1978	629000000
1979	760000000
1980	942000000
1981	912000000
1982	828000000
1983	755000000
1984	725000000
1985	623000000
1986	638000000
1987	570000000
1988	600000000
1989	822000000
1990	926000000
1991	849000000
1992	710000000
1993	728000000
1994	1032000000
1995	1101000000
1996	1137000000
1997	1167000000
1998	1104000000
1999	1051000000
2000	1230000000
2001	1285000000
2002	1299000000
2003	1597000000
2004	2166000000
2005	2827000000
2006	3952000000
2007	4504000000
2008	6525000000
2009	4960000000
2010	6402000000
2011	8358000000
2012	11254000000
2013	11657000000
2014	12300000000
2015	8726000000
2016	7082000000
2017	7846000000
2018	8965000000
2019	8757000000
2020	7015000000
2021	11030000000
2022	13653000000
2023	11018000000