Quarter	Percent of Capacity, Seasonally Adjusted
1987-01-01	81
1987-04-01	80.6
1987-07-01	81.2
1987-10-01	81
1988-01-01	80.1
1988-04-01	79.5
1988-07-01	80.1
1988-10-01	80
1989-01-01	80.1
1989-04-01	81.6
1989-07-01	81.3
1989-10-01	82
1990-01-01	83.7
1990-04-01	82.5
1990-07-01	81.4
1990-10-01	81.1
1991-01-01	80.9
1991-04-01	81.7
1991-07-01	80.5
1991-10-01	80.4
1992-01-01	79.1
1992-04-01	79.9
1992-07-01	79.9
1992-10-01	79.4
1993-01-01	77.7
1993-04-01	76.3
1993-07-01	78
1993-10-01	78.5
1994-01-01	80.1
1994-04-01	81.2
1994-07-01	82.5
1994-10-01	83.1
1995-01-01	84
1995-04-01	83.8
1995-07-01	83
1995-10-01	82.4
1996-01-01	82.2
1996-04-01	81.2
1996-07-01	81
1996-10-01	82
1997-01-01	82.2
1997-04-01	82.5
1997-07-01	83.8
1997-10-01	84.4
1998-01-01	85.3
1998-04-01	84.7
1998-07-01	86.1
1998-10-01	85.5
1999-01-01	83
1999-04-01	82.9
1999-07-01	81.2
1999-10-01	81.2
2000-01-01	81.2
2000-04-01	82.6
2000-07-01	82.4
2000-10-01	83.2
2001-01-01	84
2001-04-01	82.9
2001-07-01	82
2001-10-01	81.9
2002-01-01	80.9
2002-04-01	81.4
2002-07-01	80.8
2002-10-01	81.3
2003-01-01	81.3
2003-04-01	80.5
2003-07-01	80.4
2003-10-01	79.8
2004-01-01	81.5
2004-04-01	81.8
2004-07-01	82.9
2004-10-01	82.7
2005-01-01	81.8
2005-04-01	83.3
2005-07-01	84.3
2005-10-01	84
2006-01-01	84.6
2006-04-01	85.5
2006-07-01	84.3
2006-10-01	87.5
2007-01-01	87.3
2007-04-01	88.8
2007-07-01	88.9
2007-10-01	87.1
2008-01-01	87.1
2008-04-01	84.5
2008-07-01	83.3
2008-10-01	81.6
2009-01-01	79.2
2009-04-01	75.4
2009-07-01	72.8
2009-10-01	70.9
2010-01-01	72.3
2010-04-01	74.6
2010-07-01	77.4
2010-10-01	78.3
2011-01-01	77
2011-04-01	78.3
2011-07-01	80.4
2011-10-01	78
2012-01-01	79.1
2012-04-01	79.7
2012-07-01	78
2012-10-01	79
2013-01-01	77.9
2013-04-01	77.3
2013-07-01	76.7
2013-10-01	79.5
2014-01-01	80.5
2014-04-01	79.2
2014-07-01	78.3
2014-10-01	80.7
2015-01-01	80.3
2015-04-01	81.2
2015-07-01	80.6
2015-10-01	80.6
2016-01-01	79.6
2016-04-01	80.1
2016-07-01	81.3
2016-10-01	78.5
2017-01-01	79.3
2017-04-01	80.1
2017-07-01	80.5
2017-10-01	79.0
2018-01-01	81.1
2018-04-01	81.1
2018-07-01	80.7
2018-10-01	80.8