Quarterly
1986-09-30 128214
1986-12-31 131920
1987-03-31 131821
1987-06-30 135595
1987-09-30 138950
1987-12-31 142284
1988-03-31 138974
1988-06-30 143998
1988-09-30 147136
1988-12-31 149819
1989-03-31 152094
1989-06-30 148965
1989-09-30 147176
1989-12-31 147949
1990-03-31 140023
1990-06-30 136896
1990-09-30 149635
1990-12-31 151383
1991-03-31 148814
1991-06-30 138280
1991-09-30 141813
1991-12-31 129130
1992-03-31 122189
1992-06-30 116536
1992-09-30 121410
1992-12-31 120283
1993-03-31 114118
1993-06-30 110633
1993-09-30 105814
1993-12-31 103677
1994-03-31 98875
1994-06-30 103701
1994-09-30 110350
1994-12-31 108681
1995-03-31 104695
1995-06-30 106635
1995-09-30 114827
1995-12-31 118680
1996-03-31 125416
1996-06-30 125499
1996-09-30 127926
1996-12-31 131708
1997-03-31 144894
1997-06-30 147827
1997-09-30 162415
1997-12-31 175487
1998-03-31 154501
1998-06-30 162655
1998-09-30 173558
1998-12-31 160319
1999-03-31 187926
1999-06-30 204812
1999-09-30 198082
1999-12-31 195588
2000-03-31 213903
2000-06-30 219986
2000-09-30 211858
2000-12-31 224957
2001-03-31 257467
2001-06-30 246196
2001-09-30 255684
2001-12-31 254124
2002-03-31 265094
2002-06-30 262131
2002-09-30 289227
2002-12-31 287880
2003-03-31 308898
2003-06-30 330879
2003-09-30 355281
2003-12-31 379884
2004-03-31 430142
2004-06-30 401297
2004-09-30 443583
2004-12-31 474747
2005-03-31 530670
2005-06-30 520279
2005-09-30 549953
2005-12-31 556192
2006-03-31 636118
2006-06-30 684462
2006-09-30 751443
2006-12-31 693947
2007-03-31 803982
2007-06-30 878577
2007-09-30 963890
2007-12-31 974482
2008-03-31 979358
2008-06-30 1027069
2008-09-30 1020522
2008-12-31 795621
2009-03-31 815276
2009-06-30 801765
2009-09-30 833729
2009-12-31 834844
2010-03-31 837002
2010-06-30 858532
2010-09-30 927649
2010-12-31 946864
2011-03-31 1019519
2011-06-30 1040123
2011-09-30 916505
2011-12-31 883514
2012-03-31 933802
2012-06-30 906571
2012-09-30 903329
2012-12-31 886894
2013-03-31 895134
2013-06-30 939400
2013-09-30 918080
2013-12-31 865609
2014-03-31 901694
2014-06-30 898066
2014-09-30 898884
2014-12-31 890819
2015-03-31 883411
2015-06-30 864194
2015-09-30 903088
2015-12-31 851975