Quarter	Percent of Capacity, Seasonally Adjusted
1977-01-01	76.1377622485161
1977-04-01	75.9457113146782
1977-07-01	77.3152375221252
1977-10-01	78.6052016615868
1978-01-01	78.1232211068273
1978-04-01	77.9568421095610
1978-07-01	78.3291422724724
1978-10-01	77.5978814363480
1979-01-01	78.0937462374568
1979-04-01	78.9675301201642
1979-07-01	78.3666222691536
1979-10-01	78.5952777266502
1980-01-01	79.0277441125363
1980-04-01	79.9914079066366
1980-07-01	78.4368792176247
1980-10-01	79.5489916801453
1981-01-01	77.9961898236070
1981-04-01	76.9798686429858
1981-07-01	77.5451044142246
1981-10-01	77.4627661108971
1982-01-01	77.9994059495511
1982-04-01	76.9594083987176
1982-07-01	76.6440130472183
1982-10-01	76.3510320484638
1983-01-01	77.0827205404639
1983-04-01	75.8737396448851
1983-07-01	75.7397312819958
1983-10-01	75.2486640661955
1984-01-01	74.2025251835585
1984-04-01	74.7729542702436
1984-07-01	73.8037278056145
1984-10-01	74.1446048468351
1985-01-01	74.3576827645302
1985-04-01	74.6770119369030
1985-07-01	74.8484494388104
1985-10-01	75.0209000948816
1986-01-01	75.4995510876179
1986-04-01	76.6848540604114
1986-07-01	76.8058232963085
1986-10-01	76.9077345207334
1987-01-01	82.1000000000000
1987-04-01	82.0000000000000
1987-07-01	82.0000000000000
1987-10-01	82.4000000000000
1988-01-01	82.7000000000000
1988-04-01	82.5000000000000
1988-07-01	82.2000000000000
1988-10-01	81.6000000000000
1989-01-01	81.5000000000000
1989-04-01	83.0000000000000
1989-07-01	82.3000000000000
1989-10-01	82.2000000000000
1990-01-01	81.1000000000000
1990-04-01	80.6000000000000
1990-07-01	82.3000000000000
1990-10-01	81.3000000000000
1991-01-01	82.3000000000000
1991-04-01	79.7000000000000
1991-07-01	78.0000000000000
1991-10-01	80.0000000000000
1992-01-01	78.8000000000000
1992-04-01	78.7000000000000
1992-07-01	78.9000000000000
1992-10-01	78.4000000000000
1993-01-01	76.8000000000000
1993-04-01	76.9000000000000
1993-07-01	75.0000000000000
1993-10-01	75.0000000000000
1994-01-01	77.5000000000000
1994-04-01	79.6000000000000
1994-07-01	81.8000000000000
1994-10-01	83.0000000000000
1995-01-01	83.1000000000000
1995-04-01	83.3000000000000
1995-07-01	83.7000000000000
1995-10-01	83.1000000000000
1996-01-01	83.5000000000000
1996-04-01	81.6000000000000
1996-07-01	83.0000000000000
1996-10-01	81.6000000000000
1997-01-01	84.4000000000000
1997-04-01	84.6000000000000
1997-07-01	82.9000000000000
1997-10-01	85.4000000000000
1998-01-01	83.7000000000000
1998-04-01	86.6000000000000
1998-07-01	84.7000000000000
1998-10-01	85.0000000000000
1999-01-01	84.8000000000000
1999-04-01	83.8000000000000
1999-07-01	84.2000000000000
1999-10-01	84.5000000000000
2000-01-01	84.7000000000000
2000-04-01	84.0000000000000
2000-07-01	85.7000000000000
2000-10-01	84.5000000000000
2001-01-01	86.1000000000000
2001-04-01	85.5000000000000
2001-07-01	86.1000000000000
2001-10-01	83.4000000000000
2002-01-01	81.5000000000000
2002-04-01	82.9000000000000
2002-07-01	82.7000000000000
2002-10-01	84.8000000000000
2003-01-01	80.3000000000000
2003-04-01	80.3000000000000
2003-07-01	79.0000000000000
2003-10-01	86.9000000000000
2004-01-01	83.4000000000000
2004-04-01	82.0000000000000
2004-07-01	84.1000000000000
2004-10-01	82.8000000000000
2005-01-01	84.3000000000000
2005-04-01	81.9000000000000
2005-07-01	82.6000000000000
2005-10-01	81.8000000000000
2006-01-01	81.5000000000000
2006-04-01	80.8000000000000
2006-07-01	82.1000000000000
2006-10-01	80.0000000000000
2007-01-01	82.3000000000000
2007-04-01	84.4000000000000
2007-07-01	86.9000000000000
2007-10-01	84.0000000000000
2008-01-01	80.8000000000000
2008-04-01	85.0000000000000
2008-07-01	82.4000000000000
2008-10-01	81.7000000000000
2009-01-01	79.1000000000000
2009-04-01	73.3000000000000
2009-07-01	74.1000000000000
2009-10-01	75.0000000000000
2010-01-01	77.2000000000000
2010-04-01	78.8000000000000
2010-07-01	77.8000000000000
2010-10-01	77.4000000000000
2011-01-01	76.3000000000000
2011-04-01	79.2000000000000
2011-07-01	77.1000000000000
2011-10-01	76.3000000000000
2012-01-01	76.9000000000000
2012-04-01	77.0000000000000
2012-07-01	77.0000000000000
2012-10-01	75.5000000000000
2013-01-01	76.4000000000000
2013-04-01	76.8000000000000
2013-07-01	76.0000000000000
2013-10-01	76.0000000000000
2014-01-01	79.2000000000000
2014-04-01	77.7000000000000
2014-07-01	78.4000000000000
2014-10-01	78.4000000000000
2015-01-01	80.8000000000000
2015-04-01	80.4000000000000
2015-07-01	80.1000000000000
2015-10-01	80.4000000000000
2016-01-01	80.0000000000000
2016-04-01	80.8000000000000
2016-07-01	79.6000000000000
2016-10-01	80.3000000000000
2017-01-01	79.8000000000000
2017-04-01	79.1000000000000
2017-07-01	80.9000000000000
2017-10-01	81.7000000000000
2018-01-01	81.6000000000000
2018-04-01	81.4000000000000
2018-07-01	82.0000000000000
2018-10-01	81.2000000000000