Quarterly Percent
1998-01-01 42.8
1998-04-01 39.4
1998-07-01 40.8
1998-10-01 41.4
1999-01-01 41.6
1999-04-01 41.2
1999-07-01 40.6
1999-10-01 42.7
2000-01-01 40.6
2000-04-01 38
2000-07-01 37.8
2000-10-01 36.4
2001-01-01 37.2
2001-04-01 36.1
2001-07-01 33.6
2001-10-01 35.5
2002-01-01 37.6
2002-04-01 34.5
2002-07-01 33.3
2002-10-01 34.2
2003-01-01 35.7
2003-04-01 34.9
2003-07-01 36.3
2003-10-01 38.1
2004-01-01 37.6
2004-04-01 35
2004-07-01 34.3
2004-10-01 35.4
2005-01-01 33.4
2005-04-01 34.1
2005-07-01 33.7
2005-10-01 35.7
2006-01-01 34.1
2006-04-01 33.5
2006-07-01 33.6
2006-10-01 35.9
2007-01-01 33.8
2007-04-01 31.6
2007-07-01 31.7
2007-10-01 29.7
2008-01-01 30
2008-04-01 27.3
2008-07-01 27.7
2008-10-01 28.4
2009-01-01 32
2009-04-01 32.2
2009-07-01 32.9
2009-10-01 36.1
2010-01-01 38.2
2010-04-01 39.1
2010-07-01 40.9
2010-10-01 43
2011-01-01 46.7
2011-04-01 50.7
2011-07-01 51.9
2011-10-01 56.8
2012-01-01 60.3
2012-04-01 61.8
2012-07-01 65.3
2012-10-01 64.9
2013-01-01 66.1
2013-04-01 64.9
2013-07-01 62.4
2013-10-01 61.9
2014-01-01 61.5
2014-04-01 57.5
2014-07-01 56.6
2014-10-01 56.9
2015-01-01 57.0
2015-04-01 54.1
2015-07-01 54.5
2015-10-01 54.3
2016-01-01 55.1
2016-04-01 52.5
2016-07-01 46.9
2016-10-01 48.6
2017-01-01 51.4
2017-04-01 48.6
2017-07-01 44.4
2017-10-01 48.2
2018-01-01 48.6
2018-04-01 42.6