Year	current US$
1960	354000000
1961	342000000
1962	349000000
1963	384000000
1964	432000000
1965	430000000
1966	428000000
1967	424000000
1968	450000000
1969	485000000
1970	488000000
1971	502000000
1972	643000000
1973	910000000
1974	1708000000
1975	1543000000
1976	1261000000
1977	1302000000
1978	1508000000
1979	1959000000
1980	2441000000
1981	2386000000
1982	2062000000
1983	2006000000
1984	2171000000
1985	2165000000
1986	2433000000
1987	2807000000
1988	3626000000
1989	3337000000
1990	4265000000
1991	4284000000
1992	3973000000
1993	3696000000
1994	5556000000
1995	6881000000
1996	6881000000
1997	7032000000
1998	7153000000
1999	7503000000
2000	7432000000
2001	7144000000
2002	7849000000
2003	8778000000
2004	9925000000
2005	11190000000
2006	12744000000
2007	15340000000
2008	20345000000
2009	14054000000
2010	17771000000
2011	21654000000
2012	21446000000
2013	21972000000
2014	23920000000
2015	22334000000
2016	22661000000
2017	25272000000
2018	28609000000
2019	29132000000
2020	27159000000
2021	35843000000
2022	41481000000
2023	41642000000