$77.1 billion from 1995-2010
1995 $2,934,905,729
1996 $2,119,059,177
1997 $2,906,300,158
1998 $5,064,623,703
1999 $7,567,377,481
2000 $8,058,490,168
2001 $5,982,553,435
2002 $2,498,438,680
2003 $3,439,944,865
2004 $5,308,631,480
2005 $10,138,944,101
2006 $5,796,967,433
2007 $3,805,912,131
2008 $4,194,188,347
2009 $3,787,926,179
2010 $3,519,507,154