Quarterly Percent
1999-01-01 74.8
1999-04-01 75.2
1999-07-01 76
1999-10-01 75.7
2000-01-01 75.4
2000-04-01 75.4
2000-07-01 76.2
2000-10-01 75.7
2001-01-01 75.3
2001-04-01 74.6
2001-07-01 74.3
2001-10-01 73.9
2002-01-01 73.3
2002-04-01 73.6
2002-07-01 73.1
2002-10-01 72.3
2003-01-01 72.8
2003-04-01 71.9
2003-07-01 70.8
2003-10-01 70.6
2004-01-01 70
2004-04-01 68.9
2004-07-01 67.4
2004-10-01 67
2005-01-01 66.4
2005-04-01 65.6
2005-07-01 64.3
2005-10-01 63.7
2006-01-01 63.8
2006-04-01 63.6
2006-07-01 63
2006-10-01 62.9
2007-01-01 62.5
2007-04-01 61.7
2007-07-01 60.4
2007-10-01 60.2
2008-01-01 59.4
2008-04-01 58.8
2008-07-01 56.9
2008-10-01 57.3
2009-01-01 58
2009-04-01 57.4
2009-07-01 56.5
2009-10-01 56.8
2010-01-01 55.3
2010-04-01 54.5
2010-07-01 54.8
2010-10-01 55.1
2011-01-01 55.3
2011-04-01 54.2
2011-07-01 53.5
2011-10-01 53.2
2012-01-01 52.6
2012-04-01 51.4
2012-07-01 51.5
2012-10-01 50.5
2013-01-01 50.5
2013-04-01 50.3
2013-07-01 50.5
2013-10-01 50.8
2014-01-01 51
2014-04-01 50.3
2014-07-01 49.5
2014-10-01 48.9
2015-01-01 48.8
2015-04-01 48.9
2015-07-01 48.0
2015-10-01 47.1
2016-01-01 47.5
2016-04-01 45.4
2016-07-01 46.2
2016-10-01 45.4
2017-01-01 44.9
2017-04-01 43.6
2017-07-01 43.5
2017-10-01 42.6
2018-01-01 43.0
2018-04-01 43.5