Treasury interest expense on outstanding debt

Current Fiscal Year
December $97,775,030,034.07
November $18,558,733,892.95
October 18,984,305,636.29
Fiscal Year Total $135,318,069,563.31

2008 $451,154,049,950.63
2007 $429,977,998,108.20
2006 $405,872,109,315.83
2005 $352,350,252,507.90
2004 $321,566,323,971.29
2003 $318,148,529,151.51
2002 $332,536,958,599.42
2001 $359,507,635,242.41
2000 $361,997,734,302.36
1999 $353,511,471,722.87
1998 $363,823,722,920.26

See additional years here...