Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	4915000000
1981-01-01	5979000000
1982-01-01	6910000000
1983-01-01	6432000000
1984-01-01	6292000000
1985-01-01	5177000000
1986-01-01	6207000000
1987-01-01	8262000000
1988-01-01	8965000000
1989-01-01	9401000000
1990-01-01	10240000000
1991-01-01	10616000000
1992-01-01	11182000000
1993-01-01	13681000000
1994-01-01	17588000000
1995-01-01	23772000000
1996-01-01	24217000000
1997-01-01	27213000000
1998-01-01	26354000000
1999-01-01	27143000000
2000-01-01	31540000000
2001-01-01	30200000000
2002-01-01	30557000000
2003-01-01	34975000000
2004-01-01	44540000000
2005-01-01	49745000000
2006-01-01	56842000000
2007-01-01	72995000000
2008-01-01	90635000000
2009-01-01	73580000000
2010-01-01	87282000000
2011-01-01	95257000000
2012-01-01	111559000000
2013-01-01	112993000000