Quarter	Thousands
2001-03-31	106800
2001-06-30	110426
2001-09-30	115612
2001-12-31	115658
2002-03-31	128451
2002-06-30	154600
2002-09-30	144168
2002-12-31	150625
2003-03-31	153621
2003-06-30	182369
2003-09-30	193344
2003-12-31	168592
2004-03-31	155651
2004-06-30	176293
2004-09-30	145326
2004-12-31	115586
2005-03-31	122030
2005-06-30	148097
2005-09-30	154865
2005-12-31	135697
2006-03-31	140665
2006-06-30	167214
2006-09-30	168648
2006-12-31	138609
2007-03-31	152697
2007-06-30	147494
2007-09-30	139923
2007-12-31	124468
2008-03-31	115271
2008-06-30	102130
2008-09-30	93817
2008-12-31	67238
2009-03-31	42139
2009-06-30	63353
2009-09-30	55960
2009-12-31	48615