Quarter	Billions of US Dollars
1997-10-01	320.49
1998-01-01	380.69
1998-04-01	358.84
1998-07-01	337.76
1998-10-01	447.72
1999-01-01	376.78
1999-04-01	483.94
1999-07-01	493.04
1999-10-01	560.15
2000-01-01	527.12
2000-04-01	583.47
2000-07-01	496.91
2000-10-01	498.14
2001-01-01	532.25
2001-04-01	582.93
2001-07-01	546.08
2001-10-01	452.98
2002-01-01	492.76
2002-04-01	607.53
2002-07-01	515.61
2002-10-01	495.55
2003-01-01	603.26
2003-04-01	704.73
2003-07-01	733.57
2003-10-01	795.78
2004-01-01	957.63
2004-04-01	1047.87
2004-07-01	897.03
2004-10-01	958.62
2005-01-01	1016.14
2005-04-01	1002.89
2005-07-01	939.28
2005-10-01	909.04
2006-01-01	942.63
2006-04-01	984.91
2006-07-01	919.76
2006-10-01	930.16
2007-01-01	967.40
2007-04-01	1007.84
2007-07-01	1031.65
2007-10-01	1057.73
2008-01-01	1228.96
2008-04-01	1172.11
2008-07-01	1189.54
2008-10-01	1373.46
2009-01-01	1335.02
2009-04-01	1575.97
2009-07-01	1689.90
2009-10-01	1717.76
2010-01-01	1727.02
2010-04-01	1931.38
2010-07-01	1957.08
2010-10-01	2004.47
2011-01-01	1945.11
2011-04-01	2180.43
2011-07-01	2386.13
2011-10-01	2294.23
2012-01-01	2065.81
2012-04-01	2276.74
2012-07-01	2326.30
2012-10-01	2188.62
2013-01-01	1842.63
2013-04-01	1856.79
2013-07-01	1779.72
2013-10-01	1629.77
2014-01-01	1634.04
2014-04-01	1706.52
2014-07-01	1525.45
2014-10-01	1263.93
2015-01-01	1391.50