Year US Dollars adjusted for inflation) 1965 5000000 1966 1000000 1967 18000000 1968 1000000 1970 5000000 1971 18000000 1972 2000000 1973 1000000 1974 15000000 1975 1000000 1976 0 1978 46000000 1979 64000000 1981 8000000 1982 12000000 1983 85000000 1984 60000000 1986 13000000 1990 4000000 1991 4000000 1996 17000000 1997 31000000 1998 7000000 1999 4000000 2001 5000000 2002 1000000 2003 0 2004 0 2005 1000000 2006 1000000 2009 33000000 2010 33000000 2011 229000000 2012 20000000 2013 15000000 2014 121000000 2015 36000000 2021 0