Quarterly
1997-09-30 11353
1997-12-31 10572
1998-03-31 11107
1998-06-30 10926
1998-09-30 10724
1998-12-31 10250
1999-03-31 10103
1999-06-30 9968
1999-09-30 10355
1999-12-31 1345
2000-03-31 10902
2000-06-30 14026
2000-09-30 13434
2000-12-31 14018
2001-03-31 13841
2001-06-30 13318
2001-09-30 9868
2001-12-31 8344
2002-03-31 9943
2002-06-30 11004
2002-09-30 11223
2002-12-31 8729
2003-03-31 10300
2003-06-30 10096
2003-09-30 12052
2003-12-31 13254
2004-03-31 12773
2004-06-30 12474
2004-09-30 12066
2004-12-31 11802
2005-03-31 11916
2005-06-30 12521
2005-09-30 12751
2005-12-31 11941
2006-03-31 12180
2006-06-30 11579
2006-09-30 13687
2006-12-31 12563
2007-03-31 12565
2007-06-30 12615
2007-09-30 12473
2007-12-31 14831
2008-03-31 15139
2008-06-30 15591
2008-09-30 12701
2008-12-31 13398
2009-03-31 14055
2009-06-30 14412
2009-09-30 14468
2009-12-31 14356
2010-03-31 17018
2010-06-30 20103
2010-09-30 19385
2010-12-31 19581
2011-03-31 20742
2011-06-30 20525
2011-09-30 20403
2011-12-31 21341
2012-03-31 22629
2012-06-30 24797
2012-09-30 27106
2012-12-31 27145
2013-03-31 27030
2013-06-30 28359
2013-09-30 30239
2013-12-31 31161
2014-03-31 30967
2014-06-30 32525
2014-09-30 33356
2014-12-31 34860
2015-03-31 43728
2015-06-30 45371
2015-09-30 46738
2015-12-31 47295
2016-03-31 49373
2016-06-30 53339
2016-09-30 51327
2016-12-31 48997
2017-03-31 51016
2017-06-30 53375
2017-09-30 53743
2017-12-31 51366
2018-03-31 53060
2018-06-30 53964
2018-09-30 54530
2018-12-31 55876
2019-03-31 59826
2019-06-30 62244
2019-09-30 58381
2019-12-31 60053