Quarter	Percent
2005-01-01	69.9671409835141
2005-04-01	69.2010964788334
2005-07-01	68.7844534773651
2005-10-01	68.3495415393165
2006-01-01	67.3863812189667
2006-04-01	66.4724266853604
2006-07-01	67.6719836975616
2006-10-01	66.9171985220020
2007-01-01	66.4129387474191
2007-04-01	66.3201808237526
2007-07-01	67.5127659862656
2007-10-01	64.8668947675874
2008-01-01	64.5281123170683
2008-04-01	65.2835691079788
2008-07-01	65.7161018533521
2008-10-01	62.9079203769024
2009-01-01	63.9985163204748
2009-04-01	63.5600690712811
2009-07-01	64.0016683548829
2009-10-01	62.1981295049741
2010-01-01	62.0688451739742
2010-04-01	60.3659654429626
2010-07-01	57.8896635208142
2010-10-01	56.6103206718009
2011-01-01	58.3429953291152
2011-04-01	56.7006450760661
2011-07-01	56.6726756549617
2011-10-01	55.3570668595991
2012-01-01	54.1443034244701
2012-04-01	53.9080804566941
2012-07-01	52.8568674198300
2012-10-01	51.9958208665822
2013-01-01	54.0842603802756
2013-04-01	52.6579650982602
2013-07-01	54.3138923483483
2013-10-01	51.1743037905648
2014-01-01	50.7948092308538
2014-04-01	52.1332858971684
2014-07-01	51.8385539880117
2014-10-01	51.4998946331153
2015-01-01	53.3740942264362
2015-04-01	52.2817314741823
2015-07-01	50.9431036260343
2015-10-01	48.9454503516565
2016-01-01	51.0320375624835
2016-04-01	51.4016763588721
2016-07-01	51.3165097928471
2016-10-01	50.2735028880025
2017-01-01	50.8648184139094
2017-04-01	50.9141951217606
2017-07-01	48.0587516845774
2017-10-01	47.6571073476138
2018-01-01	48.3793387883030
2018-04-01	49.3734180543976
2018-07-01	49.2250423979739