Quarterly
1986-09-30 263481
1986-12-31 260310
1987-03-31 264239
1987-06-30 281834
1987-09-30 288561
1987-12-31 287919
1988-03-31 290931
1988-06-30 289469
1988-09-30 299382
1988-12-31 304449
1989-03-31 308769
1989-06-30 291309
1989-09-30 306585
1989-12-31 308953
1990-03-31 301619
1990-06-30 295715
1990-09-30 301782
1990-12-31 313876
1991-03-31 302043
1991-06-30 283687
1991-09-30 283885
1991-12-31 291205
1992-03-31 278990
1992-06-30 289757
1992-09-30 293240
1992-12-31 325403
1993-03-31 299610
1993-06-30 290570
1993-09-30 287215
1993-12-31 301357
1994-03-31 307421
1994-06-30 311653
1994-09-30 312386
1994-12-31 346673
1995-03-31 328436
1995-06-30 324299
1995-09-30 326856
1995-12-31 338711
1996-03-31 335276
1996-06-30 335007
1996-09-30 340187
1996-12-31 353235
1997-03-31 365815
1997-06-30 381543
1997-09-30 410854
1997-12-31 464952
1998-03-31 435202
1998-06-30 447628
1998-09-30 462081
1998-12-31 500133
1999-03-31 486590
1999-06-30 489556
1999-09-30 490198
1999-12-31 501844
2000-03-31 542042
2000-06-30 551338
2000-09-30 571685
2000-12-31 648032
2001-03-31 681682
2001-06-30 656492
2001-09-30 670014
2001-12-31 730923
2002-03-31 719458
2002-06-30 728293
2002-09-30 670599
2002-12-31 722862
2003-03-31 714652
2003-06-30 777107
2003-09-30 730582
2003-12-31 787559
2004-03-31 919474
2004-06-30 899838
2004-09-30 902279
2004-12-31 973068
2005-03-31 986085
2005-06-30 1043651
2005-09-30 1050716
2005-12-31 1055817
2006-03-31 1219685
2006-06-30 1182424
2006-09-30 1231999
2006-12-31 1329259
2007-03-31 1364837
2007-06-30 1348265
2007-09-30 1434554
2007-12-31 1477848
2008-03-31 1647887
2008-06-30 1322651
2008-09-30 1401115
2008-12-31 1354981
2009-03-31 1367030
2009-06-30 1312135
2009-09-30 1241695
2009-12-31 1261528
2010-03-31 1228063
2010-06-30 1154459
2010-09-30 1218513
2010-12-31 1233095
2011-03-31 1136195
2011-06-30 1064665
2011-09-30 1366661
2011-12-31 1363624
2012-03-31 1278317
2012-06-30 1040031
2012-09-30 1117541
2012-12-31 1102192
2013-03-31 1048564
2013-06-30 982157
2013-09-30 914494
2013-12-31 937312
2014-03-31 866399
2014-06-30 877645
2014-09-30 908829
2014-12-31 902743
2015-03-31 857511
2015-06-30 847377
2015-09-30 777999
2015-12-31 798918