Quarter	Percent
1998-04-01	10.44905008635580
1999-04-01	12.91567695962000
2000-01-01	16.92969870875180
2000-04-01	15.01154734411090
2000-07-01	15.33110740122430
2000-10-01	16.18594231307760
2001-01-01	14.74614945807190
2001-04-01	13.03083187899940
2001-07-01	13.55587808418000
2001-10-01	13.81168462847420
2002-01-01	13.20427622074540
2002-04-01	11.30720909362850
2002-07-01	10.01783590963140
2002-10-01	14.83644859813080
2003-01-01	12.86831028262180
2003-04-01	12.14926236621350
2003-07-01	9.70790378006873
2003-10-01	8.49443468072642
2004-01-01	11.42942405252160
2004-04-01	11.62312885236280
2004-07-01	11.62043795620440
2004-10-01	9.81904479382972
2005-01-01	11.62088741322060
2005-04-01	10.67181926278240
2005-07-01	6.79437294223286
2005-10-01	7.57620597810003
2006-01-01	7.64790764790765
2006-04-01	6.14509246088194
2006-07-01	5.04392179087560
2006-10-01	6.10407876230661
2007-01-01	6.69113495200452
2007-04-01	5.64812199943519
2007-07-01	4.67605633802817
2007-10-01	4.51319897814363
2008-01-01	3.61205915813424
2008-04-01	4.36021658592192
2008-07-01	6.92157409991627
2008-10-01	8.07262569832402
2009-01-01	13.55099682172780
2009-04-01	16.56530553142200
2009-07-01	16.86208821887210
2009-10-01	19.70174935474620
2010-01-01	24.86203891954690
2010-04-01	22.28773584905660
2010-07-01	15.90909090909090
2010-10-01	14.14634146341460
2011-01-01	15.40889526542320
2011-04-01	13.97101449275360
2011-07-01	10.52029731275010
2011-10-01	12.36405266170580
2012-01-01	12.69610691458450
2012-04-01	11.56422953684820
2012-07-01	9.53732614249219
2012-10-01	9.90552533638706
2013-01-01	10.83188908145580
2013-04-01	8.13452141419948
2013-07-01	8.05987334484744
2013-10-01	9.35314685314685
2014-01-01	9.34497816593886
2014-04-01	7.82857142857143
2014-07-01	8.11734548561663
2014-10-01	6.11948955916473
2015-01-01	7.55983654407472
2015-04-01	6.49387638849331
2015-07-01	4.69011725293132
2015-10-01	6.25000000000000
2016-01-01	7.38916256157636
2016-04-01	7.65164162493044
2016-07-01	7.49176728869374
2016-10-01	7.14487432928551
2017-01-01	5.92571590586901
2017-04-01	7.70925110132159
2017-07-01	5.80467675378267
2017-10-01	5.32003325020781
2018-01-01	7.45894795435569
2018-04-01	5.34435261707989