Quarterly Thousands
1987-03-31 229000
1987-06-30 291000
1987-09-30 287000
1987-12-31 269000
1988-03-31 317000
1988-06-30 379000
1988-09-30 302000
1988-12-31 213000
1989-03-31 201000
1989-06-30 262000
1989-09-30 210000
1989-12-31 185000
1990-03-31 186000
1990-06-30 183000
1990-09-30 179000
1990-12-31 173000
1991-03-31 150000
1991-06-30 190000
1991-09-30 171000
1991-12-31 150000
1992-03-31 144000
1992-06-30 159000
1992-09-30 130000
1992-12-31 98000
1993-03-31 121000
1993-06-30 158000
1993-09-30 145000
1993-12-31 137000
1994-03-31 147000
1994-06-30 171000
1994-09-30 150000
1994-12-31 134000
1995-03-31 124000
1995-06-30 141000
1995-09-30 122000
1995-12-31 126000
1996-03-31 127000
1996-06-30 158000
1996-09-30 159000
1996-12-31 145000
1997-03-31 122000
1997-06-30 138000
1997-09-30 85000
1997-12-31 51000
1998-03-31 56000
1998-06-30 66000
1998-09-30 64000
1998-12-31 44000
1999-03-31 67000
1999-06-30 96000
1999-09-30 82000
1999-12-31 59000
2000-03-31 62000
2000-06-30 86000
2000-09-30 90000
2000-12-31 73000
2001-03-31 63761
2001-06-30 57065
2001-09-30 54519
2001-12-31 49318
2002-03-31 54808
2002-06-30 74196
2002-09-30 62172
2002-12-31 55279
2003-03-31 43255
2003-06-30 51000
2003-09-30 53527
2003-12-31 47577
2004-03-31 47855
2004-06-30 57172
2004-09-30 35920
2004-12-31 32594
2005-03-31 40137
2005-06-30 52839
2005-09-30 45259
2005-12-31 42503
2006-03-31 50871
2006-06-30 73431
2006-09-30 70568
2006-12-31 51571
2007-03-31 61018
2007-06-30 65783
2007-09-30 60008
2007-12-31 46290
2008-03-31 31280
2008-06-30 29352
2008-09-30 24819
2008-12-31 17535
2009-03-31 16931
2009-06-30 30544
2009-09-30 28234
2009-12-31 27914