Quarterly Percent
1998-04-01 29.6
1998-10-01 28.7
1999-04-01 29.4
1999-10-01 28.7
2000-04-01 28.0
2000-10-01 30.4
2001-04-01 32.5
2001-10-01 33.6
2002-01-01 35.1
2002-04-01 39.5
2002-07-01 38.6
2002-10-01 41.3
2003-01-01 37.4
2003-04-01 40.4
2003-07-01 44.9
2003-10-01 42.8
2004-01-01 45.5
2004-04-01 45.9
2004-07-01 45.3
2004-10-01 46.7
2005-01-01 47.3
2005-04-01 44.9
2005-07-01 49.7
2005-10-01 50.0
2006-01-01 51.5
2006-04-01 50.4
2006-07-01 55.3
2006-10-01 51.2
2007-01-01 55.9
2007-04-01 56.0
2007-07-01 55.1
2007-10-01 55.7
2008-01-01 58.9
2008-04-01 59.6
2008-07-01 58.0
2008-10-01 60.4
2009-01-01 62.8
2009-04-01 64.0
2009-07-01 55.0
2009-10-01 56.2
2010-01-01 57.0
2010-04-01 57.5
2010-07-01 55.4
2010-10-01 52.9
2011-01-01 54.9
2011-04-01 57.9
2011-07-01 56.5
2011-10-01 59.1
2012-01-01 60.2
2012-04-01 61.5
2012-07-01 62.2
2012-10-01 59.5
2013-01-01 59.2
2013-04-01 62.4
2013-07-01 60.8
2013-10-01 59.6
2014-01-01 63.9
2014-04-01 61.9
2014-07-01 60.8
2014-10-01 60.1
2015-01-01 63.1
2015-04-01 63.3
2015-07-01 64.7
2015-10-01 63.0
2016-01-01 65.4
2016-04-01 68.4
2016-07-01 63.8
2016-10-01 66.7
2017-01-01 65.0
2017-04-01 67.7
2017-07-01 67.1
2017-10-01 67.7
2018-01-01 67.7
2018-04-01 69.9