Year	current US$
1960	13000000
1961	19000000
1962	27000000
1963	23000000
1964	34000000
1965	38000000
1966	45000000
1967	46000000
1968	41000000
1969	48000000
1970	58000000
1971	54000000
1972	66000000
1973	86000000
1974	97000000
1975	101000000
1976	126000000
1977	197000000
1978	305000000
1979	461000000
1980	594000000
1981	510000000
1982	466000000
1983	324000000
1984	288000000
1985	369000000
1986	368000000
1987	311000000
1988	387000000
1989	363000000
1990	388000000
1991	355000000
1992	479000000
1993	375000000
1994	328000000
1995	374000000
1996	448000000
1997	374000000
1998	471000000
1999	410000000
2000	395000000
2001	412000000
2002	468000000
2003	622000000
2004	711000000
2005	1026000000
2006	997000000
2007	1218000000
2008	1696000000
2009	2264000000
2010	2476000000
2011	2794000000
2012	2394000000
2013	2538000000
2014	2761000000
2015	2490000000
2016	2162000000
2017	2459000000
2018	2875000000
2019	2931000000
2020	3109000000
2021	3557000000
2022	3684000000
2023	2287000000