Quarterly Percent
1999-04-01 33.8
2000-04-01 33.4
2001-04-01 33.6
2002-04-01 33.8
2003-04-01 35.8
2004-04-01 37.9
2005-01-01 42.2
2005-04-01 42.9
2005-07-01 43
2005-10-01 44.7
2006-01-01 45.4
2006-04-01 45.7
2006-07-01 46.3
2006-10-01 47.9
2007-01-01 47.2
2007-04-01 49.2
2007-07-01 49
2007-10-01 50.1
2008-01-01 49.4
2008-04-01 50.8
2008-07-01 50.6
2008-10-01 51.3
2009-01-01 51.9
2009-04-01 53.3
2009-07-01 52.5
2009-10-01 53.8
2010-01-01 54.9
2010-04-01 54.1
2010-07-01 54.5
2010-10-01 54.9
2011-01-01 56.3
2011-04-01 56.6
2011-07-01 57.1
2011-10-01 57.1
2012-01-01 57.4
2012-04-01 57.9
2012-07-01 58.6
2012-10-01 58.7
2013-01-01 60.1
2013-04-01 60.3
2013-07-01 61.2
2013-10-01 61.6
2014-01-01 62.1
2014-04-01 62.9
2014-07-01 63.2
2014-10-01 63.4
2015-01-01 63.5
2015-04-01 63.6
2015-07-01 63.9
2015-10-01 64.3
2016-01-01 65.1
2016-04-01 65.9
2016-07-01 66.3
2016-10-01 66.3
2017-01-01 66.8
2017-04-01 67.4
2017-07-01 67.5
2017-10-01 68.1
2018-01-01 68.0
2018-04-01 68.1