Year	US Dollars, Sum Over Component Sub-periods
1960-01-01	155000000
1961-01-01	135000000
1962-01-01	195000000
1963-01-01	248000000
1964-01-01	338000000
1965-01-01	158000000
1966-01-01	384000000
1967-01-01	179000000
1968-01-01	192000000
1969-01-01	232000000
1970-01-01	260000000
1971-01-01	294000000
1972-01-01	262000000
1973-01-01	158000000
1974-01-01	2392000000
1975-01-01	611000000
1976-01-01	1035000000
1977-01-01	1304000000
1978-01-01	1628000000
1979-01-01	2046000000
1980-01-01	3334000000
1981-01-01	2981000000
1982-01-01	2916000000
1983-01-01	3075000000
1984-01-01	2797000000
1985-01-01	2824000000
1986-01-01	2655000000
1987-01-01	3028000000
1988-01-01	2735000000
1989-01-01	3052000000
1990-01-01	2825000000
1991-01-01	3848000000
1992-01-01	4139000000
1993-01-01	5321000000
1994-01-01	8185000000
1995-01-01	8405000000
1996-01-01	11288000000
1997-01-01	13892000000
1998-01-01	10340000000
1999-01-01	11931000000
2000-01-01	13456000000
2001-01-01	14723000000
2002-01-01	16086000000
2003-01-01	21780000000
2004-01-01	19775000000
2005-01-01	23663000000
2006-01-01	28670000000
2007-01-01	37032000000
2008-01-01	48400000000
2009-01-01	49192000000
2010-01-01	52144000000