Quarter	Percent
1999-04-01	2.77392510402219
2000-04-01	2.65957446808511
2001-04-01	2.26969292389853
2002-04-01	2.65251989389920
2003-01-01	3.25203252032520
2003-04-01	4.02075226977951
2003-07-01	2.42656449553001
2003-10-01	2.71739130434783
2004-01-01	2.69541778975741
2004-04-01	2.76315789473684
2004-07-01	3.30250990752972
2004-10-01	2.95698924731183
2005-01-01	2.50659630606860
2005-04-01	3.07692307692308
2005-07-01	2.24570673712021
2005-10-01	2.06451612903226
2006-01-01	2.57069408740360
2006-04-01	4.06403940886699
2006-07-01	3.02267002518892
2006-10-01	2.56410256410256
2007-01-01	1.87500000000000
2007-04-01	2.87769784172662
2007-07-01	2.54545454545455
2007-10-01	1.74781523096130
2008-01-01	2.11706102117061
2008-04-01	2.75449101796407
2008-07-01	2.48815165876777
2008-10-01	2.88808664259928
2009-01-01	4.76190476190476
2009-04-01	7.24465558194774
2009-07-01	5.48926014319809
2009-10-01	5.23809523809524
2010-01-01	5.74850299401198
2010-04-01	8.08314087759815
2010-07-01	6.78362573099415
2010-10-01	6.39053254437870
2011-01-01	5.49581839904421
2011-04-01	7.44920993227991
2011-07-01	6.20608899297424
2011-10-01	5.61660561660562
2012-01-01	6.26506024096386
2012-04-01	7.23163841807910
2012-07-01	5.02923976608187
2012-10-01	4.03321470937129
2013-01-01	5.45670225385528
2013-04-01	6.25711035267349
2013-07-01	4.18079096045198
2013-10-01	4.54029511918275
2014-01-01	4.84988452655889
2014-04-01	5.86932447397564
2014-07-01	4.41501103752759
2014-10-01	3.92376681614350
2015-01-01	4.35754189944134
2015-04-01	5.54371002132196
2015-07-01	3.96039603960396
2015-10-01	2.31277533039648
2016-01-01	2.57270693512304
2016-04-01	4.09041980624327
2016-07-01	2.89389067524116
2016-10-01	2.70270270270270
2017-01-01	2.49728555917481
2017-04-01	3.42245989304813
2017-07-01	2.51641137855580
2017-10-01	2.46252676659529
2018-01-01	2.48648648648649
2018-04-01	3.08510638297872