Quarter	Percent
1998-01-01	53.7817325307511
1999-01-01	53.9396950757080
1999-04-01	54.4436029354156
1999-07-01	54.8203616249641
1999-10-01	54.2755096720371
2000-01-01	53.7076602397082
2000-04-01	54.7456656427344
2000-07-01	55.0122376711972
2000-10-01	54.5558709408609
2001-01-01	53.5740259740260
2001-04-01	54.3159587992632
2001-07-01	54.7674026412059
2001-10-01	54.1956228606991
2002-01-01	52.9577538980194
2002-04-01	53.8014922236234
2002-07-01	54.1896651421963
2002-10-01	53.8917444665897
2003-01-01	53.2745787242841
2003-04-01	54.0797110795821
2003-07-01	54.4577691811734
2003-10-01	54.1866090268128
2004-01-01	51.5172627341694
2004-04-01	53.1148130085475
2004-07-01	53.8831967213115
2004-10-01	53.0081425326084
2005-01-01	51.8755089576547
2005-04-01	53.0117724834092
2005-07-01	54.3567622430855
2005-10-01	53.5236215491283
2006-01-01	52.3047003258152
2006-04-01	54.2601802529600
2006-07-01	55.7341880773308
2006-10-01	54.4211692431643
2007-01-01	54.1554555284532
2007-04-01	55.7599638590503
2007-07-01	56.3604904837132
2007-10-01	55.4202070331103
2008-01-01	54.4056889601122
2008-04-01	55.9556510013484
2008-07-01	56.3058788272314
2008-10-01	55.4708777891607
2009-01-01	53.4225373208847
2009-04-01	54.4677137870855
2009-07-01	55.1514547628537
2009-10-01	54.8398337357194
2010-01-01	53.2162141986214
2010-04-01	54.7240667512249
2010-07-01	55.3110095389507
2010-10-01	55.1701895405379
2011-01-01	53.8892886385629
2011-04-01	55.2360684945066
2011-07-01	55.9285555253197
2011-10-01	55.4433941308586
2012-01-01	54.1311103438070
2012-04-01	55.3756030323914
2012-07-01	56.0380418755529
2012-10-01	54.8632405249601
2013-01-01	53.3730304589674
2013-04-01	54.5796090757293
2013-07-01	55.2776008232469
2013-10-01	54.7377430003668
2014-01-01	53.5032002736112
2014-04-01	54.5148871887335
2014-07-01	55.2657169251714