Year	US Dollars, Sum Over Component Sub-periods
2001-01-01	4073960000
2002-01-01	3947900000
2003-01-01	2444140000
2004-01-01	3592190000
2005-01-01	4628650000
2006-01-01	5992290000
2007-01-01	7846870000
2008-01-01	22807030000