Quarter	Percent of Capacity, Seasonally Adjusted
1992-04-01	47.4
1992-07-01	59.4
1992-10-01	62.3
1993-01-01	62.8
1993-04-01	67.1
1993-07-01	64
1993-10-01	67
1994-01-01	67.6
1994-04-01	70.9
1994-07-01	69.9
1994-10-01	70.2
1995-01-01	73.1
1995-04-01	74.9
1995-07-01	74.3
1995-10-01	73.8
1996-01-01	75.5
1996-04-01	76
1996-07-01	74.5
1996-10-01	76.1
1997-01-01	76.8
1997-04-01	75.7
1997-07-01	75.8
1997-10-01	76.1
1998-01-01	74.6
1998-04-01	75.3
1998-07-01	73.7
1998-10-01	70.1
1999-01-01	67
1999-04-01	69.5
1999-07-01	70.3
1999-10-01	72.1
2000-01-01	68.7
2000-04-01	71.8
2000-07-01	70
2000-10-01	69.4
2001-01-01	67.3
2001-04-01	65.7
2001-07-01	64.9
2001-10-01	63.8
2002-01-01	67.7
2002-04-01	67.7
2002-07-01	69.1
2002-10-01	70.3
2003-01-01	71.4
2003-04-01	71
2003-07-01	71.4
2003-10-01	73.8
2004-01-01	75.8
2004-04-01	75.2
2004-07-01	75.2
2004-10-01	75.8
2005-01-01	75.8
2005-04-01	74.6
2005-07-01	75.6
2005-10-01	76.2
2006-01-01	76
2006-04-01	76.6
2006-07-01	77.7
2006-10-01	78.6
2007-01-01	77.6
2007-04-01	77.9
2007-07-01	78.5
2007-10-01	78.4
2008-01-01	81.1
2008-04-01	80.9
2008-07-01	79.8
2008-10-01	78.4
2009-01-01	73.6
2009-04-01	70.2
2009-07-01	69.7
2009-10-01	70.3
2010-01-01	72.3
2010-04-01	73.4
2010-07-01	74.2
2010-10-01	74.5
2011-01-01	72.8
2011-04-01	74.6
2011-07-01	73.8
2011-10-01	74
2012-01-01	74.3
2012-04-01	75.5
2012-07-01	75.7
2012-10-01	74
2013-01-01	74.2
2013-04-01	73.5
2013-07-01	74
2013-10-01	74.1
2014-01-01	76.6
2014-04-01	77.3
2014-07-01	77.2
2014-10-01	77.5
2015-01-01	78.7
2015-04-01	77.9
2015-07-01	78.1
2015-10-01	78.0
2016-01-01	79.0
2016-04-01	78.3
2016-07-01	79.1
2016-10-01	78.2
2017-01-01	79.2
2017-04-01	80.0
2017-07-01	80.0
2017-10-01	80.7
2018-01-01	82.7
2018-04-01	83.4
2018-07-01	83.3
2018-10-01	82.4