Quarterly Percent
1999-01-01 38.9
1999-04-01 36.8
1999-07-01 36.2
1999-10-01 35.5
2000-01-01 35
2000-04-01 32.1
2000-07-01 31.8
2000-10-01 32.6
2001-01-01 27.4
2001-04-01 26.3
2001-07-01 26.6
2001-10-01 27.2
2002-01-01 27
2002-04-01 27.7
2002-07-01 26.5
2002-10-01 27.1
2003-01-01 27.7
2003-04-01 26.4
2003-07-01 26.3
2003-10-01 27.3
2004-01-01 27
2004-04-01 26.4
2004-07-01 25.9
2004-10-01 26
2005-01-01 25.9
2005-04-01 24
2005-07-01 21.9
2005-10-01 21.9
2006-01-01 21.2
2006-04-01 21.7
2006-07-01 20.7
2006-10-01 22.4
2007-01-01 22.4
2007-04-01 22
2007-07-01 21.2
2007-10-01 21.3
2008-01-01 23.3
2008-04-01 25.7
2008-07-01 24.8
2008-10-01 28.3
2009-01-01 34.7
2009-04-01 35.7
2009-07-01 37.6
2009-10-01 36.4
2010-01-01 37.7
2010-04-01 40.4
2010-07-01 39.6
2010-10-01 40.8
2011-01-01 42.9
2011-04-01 43.4
2011-07-01 44
2011-10-01 45.8
2012-01-01 49.3
2012-04-01 51.7
2012-07-01 51.2
2012-10-01 53.7
2013-01-01 54.5
2013-04-01 55.6
2013-07-01 54.3
2013-10-01 54.1
2014-01-01 54.9
2014-04-01 52.4
2014-07-01 52.5
2014-10-01 52.1
2015-01-01 50.0
2015-04-01 48.3
2015-07-01 46.5
2015-10-01 47.2
2016-01-01 47.5
2016-04-01 47.3
2016-07-01 41.9
2016-10-01 43.1
2017-01-01 40.6
2017-04-01 38.2
2017-07-01 34.2
2017-10-01 37.1
2018-01-01 34.4
2018-04-01 33.7
2018-07-01 31.8