Year	current US$
1960	394000000
1961	367000000
1962	192000000
1963	759000000
1964	727000000
1965	637000000
1966	621000000
1967	723000000
1968	830000000
1969	934000000
1970	1009000000
1971	857000000
1972	1304000000
1973	1887000000
1974	4687000000
1975	4700000000
1976	5259000000
1977	5944000000
1978	6326000000
1979	9551000000
1980	13871000000
1981	14396000000
1982	13170000000
1983	12583000000
1984	12795000000
1985	12841000000
1986	7832000000
1987	8225000000
1988	7810000000
1989	9570000000
1990	12880000000
1991	12440000000
1992	11510000000
1993	10410000000
1994	8892000000
1995	10258000000
1996	13250000000
1997	13894000000
1998	10209000000
1999	12525000000
2000	22031000000
2001	19133000000
2002	18799000000
2003	23163000000
2004	31304000000
2005	46002000000
2006	54613000000
2007	60163000000
2008	79298000000
2009	45174000000
2010	57053000000
2011	73489000000
2012	71866000000
2013	64974000000
2014	60061000000
2015	34668000000
2016	30026000000
2017	35191000000
2018	41797000000
2019	35312000000
2020	21932000000
2021	38637000000
2022	65718000000
2023	51799000000