Quarterly Percent
1999-01-01 63.6
2000-01-01 60.4
2000-04-01 61.2
2000-07-01 61.9
2000-10-01 61.4
2001-01-01 59.3
2001-04-01 59.2
2001-07-01 59.6
2001-10-01 58.5
2002-01-01 56.5
2002-04-01 57
2002-07-01 57.4
2002-10-01 56.7
2003-01-01 55.2
2003-04-01 56.4
2003-07-01 57.3
2003-10-01 57
2004-01-01 55.7
2004-04-01 56.8
2004-07-01 57.8
2004-10-01 58.4
2005-01-01 57.5
2005-04-01 58.2
2005-07-01 59.9
2005-10-01 59.8
2006-01-01 58.5
2006-04-01 60.2
2006-07-01 62.2
2006-10-01 62.6
2007-01-01 62
2007-04-01 63.4
2007-07-01 64.3
2007-10-01 64.9
2008-01-01 64.9
2008-04-01 66
2008-07-01 67.2
2008-10-01 67.1
2009-01-01 65.7
2009-04-01 66
2009-07-01 66.9
2009-10-01 65.9
2010-01-01 64
2010-04-01 65.2
2010-07-01 66.2
2010-10-01 65.9
2011-01-01 64.7
2011-04-01 66
2011-07-01 66.9
2011-10-01 66.3
2012-01-01 65.1
2012-04-01 66.4
2012-07-01 67.1
2012-10-01 66.6
2013-01-01 65.2
2013-04-01 66.5
2013-07-01 67.5
2013-10-01 67.2
2014-01-01 66.3
2014-04-01 67.9
2014-07-01 69.4
2014-10-01 69.2
2015-01-01 68.1
2015-04-01 68.7
2015-07-01 70.1
2015-10-01 70.1
2016-01-01 69.9
2016-04-01 70.6
2016-07-01 71.6
2016-10-01 71.8
2017-01-01 71.8
2017-04-01 72.5
2017-07-01 73.5
2017-10-01 73.4
2018-01-01 73.1
2018-04-01 74.0