Year	current US$
1960	104000000
1961	107000000
1962	126000000
1963	132000000
1964	105000000
1965	144000000
1966	155000000
1967	165000000
1968	170000000
1969	208000000
1970	236000000
1971	260000000
1972	317000000
1973	451000000
1974	407000000
1975	308000000
1976	432000000
1977	623000000
1978	758000000
1979	1010000000
1980	1202000000
1981	1166000000
1982	1223000000
1983	1219000000
1984	1364000000
1985	1247000000
1986	1272000000
1987	1484000000
1988	1859000000
1989	2288000000
1990	2568000000
1991	2620000000
1992	3313000000
1993	2533000000
1994	3017000000
1995	3690000000
1996	3979000000
1997	3655000000
1998	3685000000
1999	3618000000
2000	3846000000
2001	3923000000
2002	4086000000
2003	4466000000
2004	5502000000
2005	6316000000
2006	6928000000
2007	8615000000
2008	10644000000
2009	7835000000
2010	8569000000
2011	8678000000
2012	7296000000
2013	6314000000
2014	7996000000
2015	7023000000
2016	7830000000
2017	9231000000
2018	10815000000
2019	9127000000
2020	8761000000
2021	10397000000
2022	12205000000
2023	13987000000