Quarter	Percent of Capacity, Seasonally Adjusted
1991-01-01	87.6
1991-04-01	83.7
1991-07-01	78.6
1991-10-01	77.3
1992-01-01	80.5
1992-04-01	80
1992-07-01	78.7
1992-10-01	76.1
1993-01-01	80.9
1993-04-01	82.4
1993-07-01	82.3
1993-10-01	83.4
1994-01-01	83.1
1994-04-01	85.4
1994-07-01	86.4
1994-10-01	87.6
1995-01-01	88.8
1995-04-01	88.7
1995-07-01	88.5
1995-10-01	86.5
1996-01-01	85.3
1996-04-01	81.3
1996-07-01	82.7
1996-10-01	84.6
1997-01-01	84.8
1997-04-01	86.7
1997-07-01	86
1997-10-01	87
1998-01-01	87.4
1998-04-01	87.9
1998-07-01	87.5
1998-10-01	85.8
1999-01-01	83.9
1999-04-01	85.6
1999-07-01	85.3
1999-10-01	85.9
2000-01-01	85.6
2000-04-01	86.2
2000-07-01	86.2
2000-10-01	86.6
2001-01-01	86.6
2001-04-01	84.9
2001-07-01	83.9
2001-10-01	82.7
2002-01-01	82
2002-04-01	82.7
2002-07-01	82.2
2002-10-01	82.5
2003-01-01	81.3
2003-04-01	81.3
2003-07-01	80.6
2003-10-01	81.6
2004-01-01	81.6
2004-04-01	83.4
2004-07-01	84.4
2004-10-01	84.2
2005-01-01	86.8
2005-04-01	84.9
2005-07-01	83.7
2005-10-01	84.6
2006-01-01	85.3
2006-04-01	85.4
2006-07-01	87.2
2006-10-01	85.2
2007-01-01	87.5
2007-04-01	86.8
2007-07-01	86.8
2007-10-01	86.7
2008-01-01	86.1
2008-04-01	86.1
2008-07-01	83.9
2008-10-01	82.7
2009-01-01	71.2
2009-04-01	66.5
2009-07-01	63.9
2009-10-01	66.5
2010-01-01	71.3
2010-04-01	73.6
2010-07-01	78.2
2010-10-01	79.1
2011-01-01	81.8
2011-04-01	83
2011-07-01	78.3
2011-10-01	78.8
2012-01-01	77.7
2012-04-01	79.9
2012-07-01	80.1
2012-10-01	77.4
2013-01-01	78.3
2013-04-01	77.4
2013-07-01	80.3
2013-10-01	77.5
2014-01-01	79.1
2014-04-01	79.9
2014-07-01	78.9
2014-10-01	77.9
2015-01-01	78.6
2015-04-01	79.1
2015-07-01	79.0
2015-10-01	80.1
2016-01-01	79.5
2016-04-01	78.0
2016-07-01	73.8
2016-10-01	80.6
2017-01-01	81.0
2017-04-01	82.1
2017-07-01	82.6
2017-10-01	83.6
2018-01-01	83.1
2018-04-01	84.3
2018-07-01	84.7
2018-10-01	84.1