Year	US Dollars, Sum Over Component Sub-periods
1987-01-01	158100000
1988-01-01	171990000
1989-01-01	182790000
1990-01-01	168060000
1991-01-01	174640000
1992-01-01	165590000
1993-01-01	173450000
1994-01-01	344970000
1995-01-01	257880000
1996-01-01	551030000
1997-01-01	300160000
1998-01-01	273480000
1999-01-01	167570000
2000-01-01	239940000
2001-01-01	155350000
2002-01-01	72570000
2003-01-01	157240000
2004-01-01	97410000
2005-01-01	206220000
2006-01-01	394390000
2007-01-01	373260000
2008-01-01	615230000
2009-01-01	241870000
2010-01-01	28110000
2011-01-01	-178450000
2012-01-01	-420280000
2013-01-01	-426910000