Quarter	Percent
1998-04-01	5.80990220048900
1999-04-01	4.85419734904271
2000-01-01	3.84278966703598
2000-04-01	3.46053499240230
2000-07-01	3.82825062769769
2000-10-01	3.88499298737728
2001-01-01	3.18608890758659
2001-04-01	2.51610923596195
2001-07-01	2.68794856873666
2001-10-01	2.88321067284104
2002-01-01	3.41129804404322
2002-04-01	2.88640087383943
2002-07-01	2.97884936225176
2002-10-01	3.24967824967825
2003-01-01	3.82645536695895
2003-04-01	3.79553024605136
2003-07-01	3.74598930481283
2003-10-01	4.19057322108424
2004-01-01	5.08149568552253
2004-04-01	5.04108136761198
2004-07-01	4.37691738072570
2004-10-01	4.87618344365621
2005-01-01	5.58924334300026
2005-04-01	5.08620915203684
2005-07-01	4.72323759791123
2005-10-01	4.87258908352638
2006-01-01	4.97317749501127
2006-04-01	4.28290461156255
2006-07-01	3.99039826549312
2006-10-01	4.20009197281692
2007-01-01	4.36523016898482
2007-04-01	3.65764815233502
2007-07-01	3.33375172586921
2007-10-01	3.19311328545332
2008-01-01	3.34913900673821
2008-04-01	3.16935544010540
2008-07-01	2.71731082481860
2008-10-01	2.80022598314952
2009-01-01	3.23860041851185
2009-04-01	3.30454835385899
2009-07-01	3.51921240173389
2009-10-01	3.79384570226506
2010-01-01	4.88218849840256
2010-04-01	4.50560095377661
2010-07-01	4.26851966745254
2010-10-01	4.39182501979414
2011-01-01	5.66080007965946
2011-04-01	5.05953863783568
2011-07-01	5.17339820768066
2011-10-01	5.75758318824943
2012-01-01	6.28944718681696
2012-04-01	6.09663608562691
2012-07-01	6.05655376984610
2012-10-01	6.47396603106147
2013-01-01	7.16557030851761
2013-04-01	7.07273917153453
2013-07-01	7.33570202789259
2013-10-01	7.63343989150441
2014-01-01	8.37455311229737
2014-04-01	7.88402099789040
2014-07-01	7.30908379779016
2014-10-01	7.41764905642070
2015-01-01	7.83282858873410
2015-04-01	7.22920637984702
2015-07-01	6.93451806065289
2015-10-01	7.10001934610176
2016-01-01	7.27114084199811
2016-04-01	6.65417507446911
2016-07-01	6.07396052883694
2016-10-01	6.03806973073796
2017-01-01	6.07059273057267
2017-04-01	5.46980903231944
2017-07-01	4.86402045018817
2017-10-01	4.62381144334053
2018-01-01	4.61943627218373
2018-04-01	4.00301226084296