Year US Dollars adjusted for inflation) 1960 285000000 1961 35000000 1962 47000000 1963 12000000 1964 68000000 1965 387000000 1966 619000000 1967 412000000 1968 730000000 1969 657000000 1970 893000000 1971 1296000000 1972 1242000000 1973 665000000 1974 516000000 1975 669000000 1976 588000000 1977 231000000 1978 618000000 1979 561000000 1980 950000000 1981 660000000 1982 1511000000 1983 1764000000 1984 1936000000 1985 1296000000 1986 1868000000 1987 2622000000 1988 1428000000 1989 1046000000 1990 949000000 1991 1313000000 1992 675000000 1993 1415000000 1994 1077000000 1995 1009000000 1996 766000000 1997 427000000 1998 350000000 1999 329000000 2000 310000000 2001 514000000 2002 527000000 2003 704000000 2004 411000000 2005 337000000 2006 722000000 2007 510000000 2008 607000000 2009 1133000000 2010 1472000000 2011 1266000000 2012 1520000000 2013 2059000000 2014 1308000000 2015 1800000000 2016 2449000000 2017 1617000000 2018 1372000000 2019 1585000000 2020 704000000 2021 1462000000 2022 2017000000