Quarterly Percent
1999-01-01 88.4
1999-04-01 88.7
1999-07-01 89.3
1999-10-01 89.4
2000-01-01 88.6
2000-04-01 88.9
2000-07-01 89.9
2000-10-01 89.7
2001-01-01 89.1
2001-04-01 88.9
2001-07-01 88.6
2001-10-01 89.4
2002-01-01 89
2002-04-01 89.4
2002-07-01 88.8
2002-10-01 88.4
2003-01-01 88.6
2003-04-01 87.8
2003-07-01 87.1
2003-10-01 86.8
2004-01-01 87
2004-04-01 85.6
2004-07-01 84.3
2004-10-01 83.9
2005-01-01 83.5
2005-04-01 82.2
2005-07-01 81.4
2005-10-01 80.5
2006-01-01 80.6
2006-04-01 79
2006-07-01 78.7
2006-10-01 78.1
2007-01-01 77.9
2007-04-01 76.8
2007-07-01 76.7
2007-10-01 75.6
2008-01-01 74.8
2008-04-01 74.5
2008-07-01 72.4
2008-10-01 72.7
2009-01-01 72.6
2009-04-01 71
2009-07-01 70.1
2009-10-01 70.5
2010-01-01 68.5
2010-04-01 67.6
2010-07-01 67.5
2010-10-01 67.4
2011-01-01 67.4
2011-04-01 65.9
2011-07-01 64.6
2011-10-01 63.8
2012-01-01 62.9
2012-04-01 62
2012-07-01 61.7
2012-10-01 61.4
2013-01-01 59.9
2013-04-01 59.8
2013-07-01 59.7
2013-10-01 58.8
2014-01-01 59.5
2014-04-01 58.6
2014-07-01 57.3
2014-10-01 56
2015-01-01 55.1
2015-04-01 55.1
2015-07-01 53.9
2015-10-01 52.7
2016-01-01 53.7
2016-04-01 51.7
2016-07-01 51.4
2016-10-01 50.4
2017-01-01 48.8
2017-04-01 46.7
2017-07-01 46.9
2017-10-01 45.4
2018-01-01 46.7
2018-04-01 47.2
