Quarterly Percent
1999-04-01 49.6
1999-07-01 58.7
1999-10-01 51.7
2000-01-01 51.2
2000-04-01 52.5
2000-07-01 60.3
2000-10-01 52.7
2001-01-01 52
2001-04-01 51.2
2001-07-01 58.6
2001-10-01 50.5
2002-01-01 49.1
2002-04-01 48.1
2002-07-01 55.3
2002-10-01 49.7
2003-01-01 48.8
2003-04-01 48.4
2003-07-01 54.9
2003-10-01 49.9
2004-01-01 49.3
2004-04-01 48.2
2004-07-01 55.6
2004-10-01 49.7
2005-01-01 49.4
2005-04-01 48.5
2005-07-01 56.7
2005-10-01 51.2
2006-01-01 51.2
2006-04-01 52.2
2006-07-01 58.5
2006-10-01 53.9
2007-01-01 66.5
2007-04-01 66.2
2007-07-01 69.7
2007-10-01 64.9
2008-01-01 60.9
2008-04-01 60.2
2008-07-01 61.2
2008-10-01 51.6
2009-01-01 45.8
2009-04-01 43.7
2009-07-01 42.9
2009-10-01 39.2
2010-01-01 36.4
2010-04-01 37.2
2010-07-01 38.3
2010-10-01 34.3
2011-01-01 33.2
2011-04-01 33.7
2011-07-01 35.5
2011-10-01 34.5
2012-01-01 30.1
2012-04-01 31.9
2012-07-01 34.9
2012-10-01 33.0
2013-01-01 32.7
2013-04-01 35.1
2013-07-01 38.8
2013-10-01 37.2
2014-01-01 34.2
2014-04-01 36.0
2014-07-01 39.5
2014-10-01 37.6
2015-01-01 36.4
2015-04-01 38.3
2015-07-01 41.3
2015-10-01 37.5
2016-01-01 37.7
2016-04-01 43.2
2016-07-01 46.9
2016-10-01 41.5
2017-01-01 39.0
2017-04-01 40.5
2017-07-01 40.5
2017-10-01 40.8
2018-01-01 38.9
2018-04-01 40.8