Quarterly Percent
1998-01-01 55.3
1998-04-01 56
1998-07-01 55.5
1998-10-01 56.3
1999-01-01 58
1999-04-01 58.2
1999-07-01 58
1999-10-01 57.5
2000-01-01 58.3
2000-04-01 58.3
2000-07-01 58.3
2000-10-01 58.3
2001-01-01 62.1
2001-04-01 61.2
2001-07-01 60.2
2001-10-01 60.8
2002-01-01 60.8
2002-04-01 60.7
2002-07-01 61.2
2002-10-01 61.9
2003-01-01 61
2003-04-01 61.6
2003-07-01 63
2003-10-01 64.3
2004-01-01 58.7
2004-04-01 59.7
2004-07-01 61.3
2004-10-01 61.5
2005-01-01 61.8
2005-04-01 63.1
2005-07-01 63.8
2005-10-01 63.7
2006-01-01 62.8
2006-04-01 63.8
2006-07-01 64.9
2006-10-01 65.6
2007-01-01 64.8
2007-04-01 65.8
2007-07-01 65.3
2007-10-01 66.3
2008-01-01 66.6
2008-04-01 66.2
2008-07-01 65.3
2008-10-01 65.9
2009-01-01 65.7
2009-04-01 66.4
2009-07-01 65.4
2009-10-01 66.8
2010-01-01 66.9
2010-04-01 66.8
2010-07-01 66.7
2010-10-01 67.5
2011-01-01 68.4
2011-04-01 68.8
2011-07-01 67.7
2011-10-01 68.4
2012-01-01 68.6
2012-04-01 69
2012-07-01 68.9
2012-10-01 68.5
2013-01-01 68.2
2013-04-01 68.7
2013-07-01 68
2013-10-01 68.8
2014-01-01 70.3
2014-04-01 70.3
2014-07-01 69.3
2014-10-01 70.2
2015-01-01 70.8
2015-04-01 72.2
2015-07-01 72.7
2015-10-01 73.7
2016-01-01 73.9
2016-04-01 73.7
2016-07-01 72.9
2016-10-01 73.8
2017-01-01 73.7
2017-04-01 73.5
2017-07-01 73.1
2017-10-01 75.0
2018-01-01 74.8
2018-04-01 74.8