Year	current US$
1960	881000000
1961	931000000
1962	972000000
1963	1073000000
1964	1291000000
1965	1443000000
1966	1564000000
1967	1738000000
1968	1938000000
1969	2204000000
1970	2457000000
1971	2555000000
1972	3283000000
1973	4725000000
1974	6282000000
1975	7232000000
1976	7951000000
1977	8880000000
1978	10882000000
1979	13546000000
1980	18543000000
1981	18217000000
1982	17593000000
1983	17998000000
1984	18886000000
1985	19985000000
1986	18092000000
1987	21490000000
1988	22436000000
1989	27108000000
1990	34047000000
1991	34107000000
1992	35145000000
1993	31978000000
1994	34785000000
1995	41992000000
1996	49645000000
1997	48542000000
1998	40399000000
1999	45455000000
2000	60058000000
2001	59191000000
2002	59662000000
2003	68321000000
2004	82527000000
2005	103759000000
2006	122208000000
2007	136354000000
2008	171764000000
2009	116778000000
2010	130657000000
2011	160410000000
2012	160953000000
2013	156022000000
2014	144677000000
2015	103915000000
2016	88410000000
2017	101054000000
2018	121791000000
2019	102799000000
2020	84459000000
2021	160106000000
2022	249805000000
2023	173906000000