Quarterly Percent
1998-01-01 29.9
1999-01-01 30.7
1999-04-01 29.8
1999-07-01 28.8
1999-10-01 27
2000-01-01 31.4
2000-04-01 30.7
2000-07-01 29.4
2000-10-01 30.4
2001-01-01 29
2001-04-01 30.9
2001-07-01 29.8
2001-10-01 30.9
2002-01-01 29.7
2002-04-01 30.8
2002-07-01 31
2002-10-01 31.5
2003-01-01 31
2003-04-01 32.7
2003-07-01 32
2003-10-01 32.3
2004-01-01 27.2
2004-04-01 28.6
2004-07-01 28.3
2004-10-01 29.2
2005-01-01 29.7
2005-04-01 31
2005-07-01 31.7
2005-10-01 32.2
2006-01-01 33.5
2006-04-01 34.4
2006-07-01 34.4
2006-10-01 35.1
2007-01-01 35.8
2007-04-01 37.7
2007-07-01 37.8
2007-10-01 37.7
2008-01-01 39.7
2008-04-01 39.9
2008-07-01 39.7
2008-10-01 39.6
2009-01-01 39.3
2009-04-01 40.4
2009-07-01 41
2009-10-01 41.4
2010-01-01 41.9
2010-04-01 42.4
2010-07-01 43.1
2010-10-01 41.5
2011-01-01 41.2
2011-04-01 41.8
2011-07-01 41.7
2011-10-01 41.1
2012-01-01 41.1
2012-04-01 43.3
2012-07-01 43.9
2012-10-01 44.1
2013-01-01 43.9
2013-04-01 46
2013-07-01 45.9
2013-10-01 46.2
2014-01-01 45.3
2014-04-01 47.4
2014-07-01 47.2
2014-10-01 47.7
2015-01-01 47.4
2015-04-01 48.2
2015-07-01 48.9
2015-10-01 49.7
2016-01-01 50.4
2016-04-01 52.2
2016-07-01 52.1
2016-10-01 52.2
2017-01-01 52.3
2017-04-01 53.2
2017-07-01 53.9
2017-10-01 54.8
2018-01-01 55.4
2018-04-01 55.6