Quarter	Thousands
1997-12-31	47002.7
1998-03-31	57464.4
1998-06-30	80330
1998-09-30	82583.4
1998-12-31	78448.3
1999-03-31	83368.2
1999-06-30	99660.8
1999-09-30	97443
1999-12-31	79431.5
2000-03-31	92688.4
2000-06-30	112959
2000-09-30	108195.4
2000-12-31	119733
2001-03-31	161261.8
2001-06-30	192244.5
2001-09-30	186587.3
2001-12-31	201880
2002-03-31	221354.9
2002-06-30	260652.5
2002-09-30	276329.4
2002-12-31	309125
2003-03-31	315409.5
2003-06-30	363721.9
2003-09-30	354752.9
2003-12-31	345007.8
2004-03-31	316760.7
2004-06-30	329608.9
2004-09-30	325187.5
2004-12-31	274490.7
2005-03-31	272945.6
2005-06-30	309471
2005-09-30	343991.8
2005-12-31	315162.2
2006-03-31	296185.9
2006-06-30	302588.1
2006-09-30	295003.4
2006-12-31	302632.4
2007-03-31	307480.9
2007-06-30	318679.9
2007-09-30	307193
2007-12-31	270981.7
2008-03-31	304960.1
2008-06-30	289348.4
2008-09-30	208299
2008-12-31	149893.8
2009-03-31	94618.6
2009-06-30	100391.8
2009-09-30	87616.7
2009-12-31	72585.9
2010-03-31	80563.5
2010-06-30	82603.8
2010-09-30	84768.2
2010-12-31	91289.3
2011-03-31	103312.6
2011-06-30	91092.5
2011-09-30	99611.4
2011-12-31	93229.6
2012-03-31	90717.5
2012-06-30	84950.9
2012-09-30	79425.6
2012-12-31	85297.1
2013-03-31	81887.2
2013-06-30	99670.9
2013-09-30	106775
2013-12-31	105084.2
2014-03-31	100946.7
2014-06-30	92601.7
2014-09-30	99383.1
2014-12-31	97142.4
2015-03-31	96761.9
2015-06-30	111555.1
2015-09-30	125833.5
2015-12-31	122037.3
2016-03-31	120965.5
2016-06-30	133325.5
2016-09-30	133026.8
2016-12-31	137551.6
2017-03-31	132273.6
2017-06-30	131260.8
2017-09-30	143368.2
2017-12-31	154860.5
2018-03-31	134924.8
2018-06-30	149465.4
2018-09-30	149520.1
2018-12-31	149706.1
2019-03-31	143558.5
2019-06-30	140170
2019-09-30	151066.6
2019-12-31	153078.3
2020-03-31	145437.4
2020-06-30	97451.7
2020-09-30	104579.5
2020-12-31	105633
2021-03-31	102342.2
2021-06-30	99467.1
2021-09-30	122128.9
2021-12-31	137035.8
2022-03-31	143855
2022-06-30	130392.1
2022-09-30	152126
2022-12-31	113218.5
2023-03-31	87249.5
2023-06-30	101463.6
2023-09-30	86176.7
2023-12-31	79422.8