Quarterly Percent
1998-01-01 38.6
1998-04-01 39.4
1998-07-01 38.3
1998-10-01 39.3
1999-01-01 39
1999-04-01 40.6
1999-07-01 38.9
1999-10-01 40.7
2000-01-01 41.4
2000-04-01 41.8
2000-07-01 43.8
2000-10-01 44.7
2001-01-01 45.1
2001-04-01 45.8
2001-07-01 47.6
2001-10-01 47.7
2002-01-01 46.6
2002-04-01 48.1
2002-07-01 49.4
2002-10-01 49.8
2003-01-01 48.7
2003-04-01 50.7
2003-07-01 53.5
2003-10-01 51.2
2004-01-01 51
2004-04-01 52
2004-07-01 51.5
2004-10-01 51.2
2005-01-01 51.3
2005-04-01 52.6
2005-07-01 53.9
2005-10-01 53.4
2006-01-01 53.3
2006-04-01 55
2006-07-01 55.2
2006-10-01 55.7
2007-01-01 54
2007-04-01 55.6
2007-07-01 55.9
2007-10-01 54.9
2008-01-01 55.7
2008-04-01 57.8
2008-07-01 57.7
2008-10-01 57.1
2009-01-01 54.8
2009-04-01 55.4
2009-07-01 55
2009-10-01 53.3
2010-01-01 54.4
2010-04-01 55.9
2010-07-01 56
2010-10-01 56.1
2011-01-01 55.3
2011-04-01 57.7
2011-07-01 56.9
2011-10-01 57.1
2012-01-01 55.4
2012-04-01 57.8
2012-07-01 56.3
2012-10-01 57
2013-01-01 55.2
2013-04-01 57.1
2013-07-01 57.6
2013-10-01 56
2014-01-01 56.2
2014-04-01 56.3
2014-07-01 57
2014-10-01 57.6
2015-01-01 56.6
2015-04-01 56.7
2015-07-01 58.0
2015-10-01 58.3
2016-01-01 57.5
2016-04-01 59.9
2016-07-01 61.6
2016-10-01 60.2
2017-01-01 59.5
2017-04-01 61.4
2017-07-01 62.2
2017-10-01 63.4
2018-01-01 63.3
2018-04-01 64.0