Year	current US$
1960	113000000
1961	110000000
1962	109000000
1963	152000000
1964	165000000
1965	186000000
1966	226000000
1967	198000000
1968	227000000
1969	255000000
1970	290000000
1971	283000000
1972	327000000
1973	436000000
1974	572000000
1975	624000000
1976	760000000
1977	1160000000
1978	1089000000
1979	1241000000
1980	1520000000
1981	1226000000
1982	1120000000
1983	1159000000
1984	1129000000
1985	1057000000
1986	1044000000
1987	987000000
1988	1022000000
1989	1108000000
1990	1163000000
1991	1202000000
1992	1295000000
1993	1340000000
1994	1550000000
1995	1991000000
1996	2056000000
1997	2391000000
1998	2563000000
1999	2494000000
2000	2711000000
2001	2466000000
2002	4162000000
2003	4459000000
2004	5036000000
2005	5381000000
2006	6025000000
2007	6898000000
2008	7737000000
2009	7214000000
2010	8463000000
2011	10401000000
2012	9979000000
2013	10025000000
2014	10803000000
2015	10677000000
2016	10447000000
2017	10990000000
2018	10769000000
2019	11175000000
2020	11521000000
2021	13753000000
2022	15695000000
2023	14199000000