Year	current US$
1960	654000000
1961	662000000
1962	692000000
1963	781000000
1964	840000000
1965	882000000
1966	934000000
1967	822000000
1968	1039000000
1969	1045000000
1970	1098000000
1971	1556000000
1972	1086000000
1973	1942000000
1974	6602000000
1975	8298000000
1976	9273000000
1977	9650000000
1978	11064000000
1979	21572000000
1980	26349000000
1981	10530000000
1982	10250000000
1983	8161000000
1984	9317000000
1985	10409000000
1986	7465000000
1987	9705000000
1988	9609000000
1989	12284000000
1990	10314000000
1991	377000000
1992	518000000
1993	457000000
1994	453000000
1995	496000000
1996	731000000
1997	4602000000
1998	5500000000
1999	13067000000
2000	20380000000
2001	12872000000
2002	12219000000
2003	9711000000
2004	17810000000
2005	23697000000
2006	29361000000
2007	41268000000
2008	61273000000
2009	41929000000
2010	52483000000
2011	83226000000
2012	94392000000
2013	93066000000
2014	88949000000
2015	57577000000
2016	46830000000
2017	63604000000
2018	92831000000
2019	88903000000
2020	50613000000
2021	91514000000
2022	138291000000
2023	115952000000