Year	US Dollars, Sum Over Component Sub-periods
1981-01-01	23348000000
1982-01-01	19747000000
1983-01-01	18689000000
1984-01-01	20754000000
1985-01-01	18527000000
1986-01-01	14396000000
1987-01-01	17206000000
1988-01-01	19509000000
1989-01-01	22974000000
1990-01-01	26807000000
1991-01-01	29635000000
1992-01-01	33796000000
1993-01-01	36607000000
1994-01-01	40223000000
1995-01-01	47454000000
1996-01-01	50188000000
1997-01-01	56298000000
1998-01-01	50371000000
1999-01-01	51242000000
2000-01-01	65408000000
2001-01-01	57365000000
2002-01-01	59165000000
2003-01-01	64109000000
2004-01-01	70767000000
2005-01-01	86995000000
2006-01-01	103528000000
2007-01-01	118014000000
2008-01-01	139606000000
2009-01-01	119646000000
2010-01-01	158074000000
2011-01-01	200788000000
2012-01-01	188496000000
2013-01-01	183549000000