Quarter	Percent
1999-04-01	22.30215827338130
2000-01-01	26.76399026763990
2000-04-01	22.14611872146120
2000-07-01	20.26143790849670
2000-10-01	26.41509433962260
2001-01-01	22.17484008528780
2001-04-01	18.27411167512690
2001-07-01	21.54195011337870
2001-10-01	18.69747899159660
2002-01-01	10.38647342995170
2002-04-01	17.15817694369970
2002-07-01	12.44239631336410
2002-10-01	18.97321428571430
2003-01-01	15.61712846347610
2003-04-01	23.75000000000000
2003-07-01	15.08704061895550
2003-10-01	15.64792176039120
2004-01-01	25.47619047619050
2004-04-01	26.73684210526320
2004-07-01	30.01988071570580
2004-10-01	12.25961538461540
2005-01-01	14.28571428571430
2005-04-01	22.00488997555010
2005-07-01	16.08391608391610
2005-10-01	12.30068337129840
2006-01-01	10.73170731707320
2006-04-01	11.24694376528120
2006-07-01	9.42028985507246
2006-10-01	8.35322195704057
2007-01-01	14.28571428571430
2007-04-01	13.76975169300230
2007-07-01	12.74298056155510
2007-10-01	7.80487804878049
2008-01-01	8.04878048780488
2008-04-01	10.26894865525670
2008-07-01	14.75054229934920
2008-10-01	16.85144124168510
2009-01-01	30.60000000000000
2009-04-01	34.90000000000000
2009-07-01	29.60000000000000
2009-10-01	31.40000000000000
2010-01-01	46.90000000000000
2010-04-01	41.40000000000000
2010-07-01	26.20000000000000
2010-10-01	27.00000000000000
2011-01-01	24.50000000000000
2011-04-01	25.80000000000000
2011-07-01	21.30000000000000
2011-10-01	24.00000000000000
2012-01-01	27.10000000000000
2012-04-01	30.10000000000000
2012-07-01	18.10000000000000
2012-10-01	16.40000000000000
2013-01-01	24.60000000000000
2013-04-01	16.30000000000000
2013-07-01	11.40000000000000
2013-10-01	19.80000000000000
2014-01-01	19.60000000000000
2014-04-01	22.90000000000000
2014-07-01	18.10000000000000
2014-10-01	16.30000000000000
2015-01-01	16.10000000000000
2015-04-01	11.29943502824860
2015-07-01	11.68091168091170
2015-10-01	17.47211895910780
2016-01-01	20.96219931271480
2016-04-01	15.46052631578950
2016-07-01	14.07185628742510
2016-10-01	13.13131313131310
2017-01-01	16.83168316831680
2017-04-01	16.61538461538460
2017-07-01	16.07142857142860
2017-10-01	5.75079872204473
2018-01-01	10.09463722397480
2018-04-01	11.55015197568390