Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	22249000000
1981-01-01	25080000000
1982-01-01	24308000000
1983-01-01	25541000000
1984-01-01	27956000000
1985-01-01	26872000000
1986-01-01	29971000000
1987-01-01	39254000000
1988-01-01	48770000000
1989-01-01	57540000000
1990-01-01	66199000000
1991-01-01	77491000000
1992-01-01	78132000000
1993-01-01	80031000000
1994-01-01	98092000000
1995-01-01	129398000000
1996-01-01	145128000000
1997-01-01	142082000000
1998-01-01	90675000000
1999-01-01	116965000000
2000-01-01	159394000000
2001-01-01	138143000000
2002-01-01	148987000000
2003-01-01	175664000000
2004-01-01	220482000000
2005-01-01	257016000000
2006-01-01	305061000000
2007-01-01	352439000000
2008-01-01	429481000000
2009-01-01	320324000000
2010-01-01	421362000000
2011-01-01	520105000000
2012-01-01	514358000000
2013-01-01	510191000000