Quarter	Thousands
1999-03-31	22957
1999-06-30	30264
1999-09-30	32971
1999-12-31	29956
2000-03-31	30474
2000-06-30	40289
2000-09-30	38278
2000-12-31	27997
2001-03-31	29488
2001-06-30	32730
2001-09-30	37224
2001-12-31	32406
2002-03-31	34288
2002-06-30	61411
2002-09-30	77653
2002-12-31	83632
2003-03-31	83388
2003-06-30	100332
2003-09-30	119097
2003-12-31	130406
2004-03-31	120487
2004-06-30	135617
2004-09-30	125349
2004-12-31	102377
2005-03-31	104548
2005-06-30	136667
2005-09-30	142145
2005-12-31	148871
2006-03-31	140238
2006-06-30	141425
2006-09-30	156407
2006-12-31	158513
2007-03-31	155127
2007-06-30	168508
2007-09-30	161914
2007-12-31	94634
2008-03-31	63115
2008-06-30	42008
2008-09-30	20305
2008-12-31	8884
2009-03-31	10652
2009-06-30	12420
2009-09-30	10469
2009-12-31	9393
2010-03-31	10576
2010-06-30	14188
2010-09-30	17191
2010-12-31	18447
2011-03-31	20199
2011-06-30	21347
2011-09-30	21982
2011-12-31	19843
2012-03-31	20673
2012-06-30	19930
2012-09-30	18285
2012-12-31	20016
2013-03-31	18889
2013-06-30	23568
2013-09-30	23079
2013-12-31	21032
2014-03-31	23716
2014-06-30	26278
2014-09-30	26827
2014-12-31	26273
2015-03-31	27855
2015-06-30	25370
2015-09-30	26382
2015-12-31	28328
2016-03-31	30104
2016-06-30	22780
2016-09-30	19231
2016-12-31	21770
2017-03-31	21232
2017-06-30	24536
2017-09-30	26871
2017-12-31	23831
2018-03-31	28283
2018-06-30	30512
2018-09-30	32406
2018-12-31	29420
2019-03-31	28028
2019-06-30	25749
2019-09-30	26019
2019-12-31	25390
2020-03-31	27168
2020-06-30	16810
2020-09-30	27272
2020-12-31	30750
2021-03-31	32925
2021-06-30	33253
2021-09-30	29410
2021-12-31	24762
2022-03-31	26244
2022-06-30	29365
2022-09-30	26354
2022-12-31	15389
2023-03-31	16769
2023-06-30	19798
2023-09-30	20742
2023-12-31	18511