Year	US Dollars, Sum Over Component Sub-periods
1960-01-01	2256000000
1961-01-01	2132000000
1962-01-01	2285000000
1963-01-01	2483000000
1964-01-01	2927000000
1965-01-01	2971000000
1966-01-01	2819000000
1967-01-01	2768000000
1968-01-01	2479000000
1969-01-01	2073000000
1970-01-01	2292000000
1971-01-01	2645000000
1972-01-01	2698000000
1973-01-01	3499000000
1974-01-01	5012000000
1975-01-01	4941000000
1976-01-01	4622000000
1977-01-01	5313000000
1978-01-01	7408000000
1979-01-01	9820000000
1980-01-01	13944000000
1981-01-01	14135000000
1982-01-01	14046000000
1983-01-01	13868000000
1984-01-01	14216000000
1985-01-01	15083000000
1986-01-01	15686000000
1987-01-01	17662000000
1988-01-01	20176000000
1989-01-01	22241000000
1990-01-01	23478000000
1991-01-01	20661000000
1992-01-01	22931000000
1993-01-01	24061000000
1994-01-01	29673000000
1995-01-01	37997000000
1996-01-01	43781000000
1997-01-01	45754000000
1998-01-01	44755000000
1999-01-01	45589000000
2000-01-01	53860000000
2001-01-01	51206000000
2002-01-01	54686000000
2003-01-01	68003000000
2004-01-01	95566000000
2005-01-01	134723000000
2006-01-01	166689000000
2007-01-01	207590000000
2008-01-01	291557000000
2009-01-01	247298000000
2010-01-01	323282000000