Quarterly Thousands
1987-03-31 70271
1987-06-30 96511
1987-09-30 108772
1987-12-31 80560
1988-03-31 73591
1988-06-30 110346
1988-09-30 111704
1988-12-31 87444
1989-03-31 53190
1989-06-30 52236
1989-09-30 100877
1989-12-31 96325
1990-03-31 97776
1990-06-30 84189
1990-09-30 80842
1990-12-31 78566
1991-03-31 69933
1991-06-30 91653
1991-09-30 83610
1991-12-31 70314
1992-03-31 73734
1992-06-30 90393
1992-09-30 91588
1992-12-31 70789
1993-03-31 104927
1993-06-30 115320
1993-09-30 107255
1993-12-31 84332
1994-03-31 78264
1994-06-30 98153
1994-09-30 97059
1994-12-31 86298
1995-03-31 77952
1995-06-30 83174
1995-09-30 98386
1995-12-31 86873
1996-03-31 80673
1996-06-30 111720
1996-09-30 118827
1996-12-31 119406
1997-03-31 111219
1997-06-30 180035
1997-09-30 206268
1997-12-31 155809
1998-03-31 148736
1998-06-30 195794
1998-09-30 181131
1998-12-31 153119
1999-03-31 156115
1999-06-30 216120
1999-09-30 207388
1999-12-31 178121
2000-03-31 178363
2000-06-30 219178
2000-09-30 176477
2000-12-31 170038
2001-03-31 194096
2001-06-30 292708
2001-09-30 269480
2001-12-31 213320
2002-03-31 250839
2002-06-30 314005
2002-09-30 269514
2002-12-31 231386
2003-03-31 189930
2003-06-30 254202
2003-09-30 273563
2003-12-31 247206
2004-03-31 238875
2004-06-30 278851
2004-09-30 209332
2004-12-31 155832
2005-03-31 155865
2005-06-30 222255
2005-09-30 222659
2005-12-31 204662
2006-03-31 204056
2006-06-30 247720
2006-09-30 227588
2006-12-31 211964
2007-03-31 187600
2007-06-30 237043
2007-09-30 197696
2007-12-31 135805
2008-03-31 119669
2008-06-30 112218
2008-09-30 74454
2008-12-31 61407
2009-03-31 81353
2009-06-30 125338
2009-09-30 138985
2009-12-31 123772