Year	current US$
1960	717000000
1961	793000000
1962	818000000
1963	915000000
1964	1000000000
1965	1102000000
1966	1186000000
1967	1395000000
1968	1469000000
1969	1633000000
1970	1851000000
1971	2107000000
1972	2601000000
1973	3691000000
1974	4874000000
1975	5341000000
1976	6138000000
1977	7021000000
1978	8086000000
1979	9724000000
1980	11400000000
1981	11180000000
1982	10120000000
1983	10160000000
1984	10720000000
1985	10175000000
1986	9760000000
1987	10490000000
1988	11390000000
1989	10490000000
1990	4960000000
1991	4400000000
1992	4500000000
1993	4892000000
1994	6151000000
1995	7910000000
1996	8085000000
1997	8431000000
1998	8300000000
1999	8518000000
2000	10412000000
2001	11394000000
2002	13877000000
2003	17662000000
2004	23553000000
2005	27688000000
2006	32458000000
2007	40488000000
2008	49535000000
2009	40567000000
2010	49579000000
2011	63035000000
2012	57841000000
2013	65835000000
2014	69725000000
2015	60595000000
2016	63534000000
2017	70761000000
2018	79660000000
2019	76871000000
2020	70718000000
2021	87388000000
2022	96699000000
2023	100612000000