Year	US Dollars, Sum Over Component Sub-periods
1982-01-01	-1135400000
1983-01-01	1261000000
1984-01-01	2800500000
1985-01-01	1687900000
1986-01-01	4328400000
1987-01-01	3546700000
1988-01-01	3826200000
1989-01-01	2332800000
1990-01-01	2506100000
1991-01-01	5057200000
1992-01-01	6265000000
1993-01-01	7298500000
1994-01-01	9357900000
1995-01-01	16908500000
1996-01-01	18743800000
1997-01-01	19023600000
1998-01-01	17169300000
1999-01-01	16778500000
2000-01-01	15984300000
2001-01-01	16040900000
2002-01-01	15615000000
2003-01-01	18557300000
2004-01-01	23088700000
2005-01-01	19558200000
2006-01-01	21611700000
2007-01-01	17758600000
2008-01-01	17051200000
2009-01-01	12279200000
2010-01-01	11674400000
2011-01-01	11537000000
2012-01-01	11165800000
2013-01-01	9878800000