Month	Thousands
1997-10-31	97275
1997-11-30	89080
1997-12-31	75921
1998-01-31	67371
1998-02-28	91108
1998-03-31	112509
1998-04-30	108463
1998-05-31	112109
1998-06-30	130713
1998-07-31	132605
1998-08-31	106510
1998-09-30	108557
1998-10-31	123040
1998-11-30	114956
1998-12-31	82668
1999-01-31	71673
1999-02-28	114996
1999-03-31	158137
1999-04-30	139655
1999-05-31	135134
1999-06-30	157254
1999-07-31	151973
1999-08-31	138792
1999-09-30	138397
1999-10-31	142237
1999-11-30	127023
1999-12-31	96627
2000-01-31	83260
2000-02-29	128518
2000-03-31	159153
2000-04-30	134016
2000-05-31	152270
2000-06-30	161302
2000-07-31	145965
2000-08-31	138108
2000-09-30	132531
2000-10-31	141205
2000-11-30	150726
2000-12-31	120808
2001-01-31	124648
2001-02-28	146580
2001-03-31	204916
2001-04-30	187016
2001-05-31	212327
2001-06-30	221833
2001-07-31	219020
2001-08-31	197425
2001-09-30	174438
2001-10-31	194331
2001-11-30	194165
2001-12-31	152476
2002-01-31	176318
2002-02-28	196421
2002-03-31	229669
2002-04-30	246781
2002-05-31	267365
2002-06-30	213992
2002-07-31	249841
2002-08-31	224557
2002-09-30	235508
2002-10-31	261039
2002-11-30	244678
2002-12-31	184917
2003-01-31	192777
2003-02-28	212898
2003-03-31	261649
2003-04-30	265853
2003-05-31	251894
2003-06-30	261733
2003-07-31	279666
2003-08-31	251114
2003-09-30	267415
2003-10-31	285347
2003-11-30	245714
2003-12-31	197613
2004-01-31	188313
2004-02-29	228739
2004-03-31	283162
2004-04-30	243699
2004-05-31	236462
2004-06-30	248719
2004-07-31	227054
2004-08-31	209044
2004-09-30	207190
2004-10-31	191591
2004-11-30	167010
2004-12-31	141250
2005-01-31	137218
2005-02-28	166898
2005-03-31	199491
2005-04-30	205643
2005-05-31	198203
2005-06-30	207925
2005-07-31	194436
2005-08-31	207556
2005-09-30	212231
2005-10-31	203950
2005-11-30	201906
2005-12-31	152445
2006-01-31	151027
2006-02-28	178598
2006-03-31	230533
2006-04-30	178847
2006-05-31	213746
2006-06-30	225797
2006-07-31	192250
2006-08-31	196291
2006-09-30	193770
2006-10-31	207292
2006-11-30	221034
2006-12-31	132876
2007-01-31	151005
2007-02-28	180744
2007-03-31	211422
2007-04-30	181746
2007-05-31	220072
2007-06-30	209286
2007-07-31	197013
2007-08-31	181150
2007-09-30	173688
2007-10-31	168035
2007-11-30	159853
2007-12-31	112684
2008-01-31	146078
2008-02-29	171647
2008-03-31	149298
2008-04-30	170633
2008-05-31	141794
2008-06-30	129182
2008-07-31	122264
2008-08-31	92136
2008-09-30	109351
2008-10-31	113697
2008-11-30	68976
2008-12-31	62584
2009-01-31	67707
2009-02-28	82105
2009-03-31	91811
2009-04-30	84249
2009-05-31	87831
2009-06-30	103236
2009-07-31	106487
2009-08-31	81247
2009-09-30	93172
2009-10-31	90961
2009-11-30	87320
2009-12-31	70300