Quarter	Hours
1984-01-01	156.266666666667
1984-04-01	145.100000000000
1984-07-01	143.300000000000
1984-10-01	144.333333333333
1985-01-01	149.633333333333
1985-04-01	143.933333333333
1985-07-01	143.900000000000
1985-10-01	143.833333333333
1986-01-01	145.000000000000
1986-04-01	146.866666666667
1986-07-01	143.600000000000
1986-10-01	143.066666666667
1987-01-01	151.533333333333
1987-04-01	147.400000000000
1987-07-01	144.633333333333
1987-10-01	148.400000000000
1988-01-01	153.000000000000
1988-04-01	148.866666666667
1988-07-01	145.500000000000
1988-10-01	144.500000000000
1989-01-01	148.733333333333
1989-04-01	146.700000000000
1989-07-01	143.566666666667
1989-10-01	142.866666666667
1990-01-01	146.500000000000
1990-04-01	144.500000000000
1990-07-01	140.600000000000
1990-10-01	142.200000000000
1991-01-01	143.900000000000
1991-04-01	145.200000000000
1991-07-01	137.600000000000
1991-10-01	138.300000000000
1992-01-01	144.600000000000
1992-04-01	137.900000000000
1992-07-01	132.400000000000
1992-10-01	135.100000000000
1993-01-01	145.200000000000
1993-04-01	145.900000000000
1993-07-01	141.800000000000
1993-10-01	144.200000000000
1994-01-01	148.300000000000
1994-04-01	148.400000000000
1994-07-01	144.700000000000
1994-10-01	145.100000000000
1995-01-01	152.300000000000
1995-04-01	148.100000000000
1995-07-01	143.400000000000
1995-10-01	144.500000000000
1996-01-01	151.400000000000
1996-04-01	149.400000000000
1996-07-01	145.700000000000
1996-10-01	145.800000000000
1997-01-01	150.000000000000
1997-04-01	153.500000000000
1997-07-01	147.100000000000
1997-10-01	144.900000000000
1998-01-01	153.300000000000
1998-04-01	150.300000000000
1998-07-01	146.800000000000
1998-10-01	145.600000000000
1999-01-01	149.600000000000
1999-04-01	151.900000000000
1999-07-01	147.500000000000
1999-10-01	149.400000000000
2000-01-01	156.600000000000
2000-04-01	151.500000000000
2000-07-01	147.400000000000
2000-10-01	143.100000000000
2001-01-01	153.200000000000
2001-04-01	149.500000000000
2001-07-01	143.300000000000
2001-10-01	142.600000000000
2002-01-01	150.200000000000
2002-04-01	150.100000000000
2002-07-01	145.700000000000
2002-10-01	143.000000000000
2003-01-01	150.700000000000
2003-04-01	149.200000000000
2003-07-01	147.200000000000
2003-10-01	145.300000000000
2004-01-01	154.300000000000
2004-04-01	152.300000000000
2004-07-01	147.900000000000
2004-10-01	147.600000000000
2005-01-01	150.800000000000
2005-04-01	155.600000000000
2005-07-01	149.200000000000
2005-10-01	145.200000000000
2006-01-01	156.300000000000
2006-04-01	151.800000000000
2006-07-01	148.600000000000
2006-10-01	143.000000000000
2007-01-01	153.300000000000
2007-04-01	151.700000000000
2007-07-01	146.100000000000
2007-10-01	141.700000000000
2008-01-01	153.500000000000
2008-04-01	153.700000000000
2008-07-01	147.200000000000
2008-10-01	140.400000000000
2009-01-01	147.900000000000
2009-04-01	148.100000000000
2009-07-01	147.700000000000
2009-10-01	145.100000000000
2010-01-01	154.000000000000
2010-04-01	155.000000000000
2010-07-01	150.400000000000
2010-10-01	146.700000000000
2011-01-01	156.200000000000
2011-04-01	155.200000000000
2011-07-01	151.200000000000
2011-10-01	143.000000000000
2012-01-01	157.000000000000
2012-04-01	152.900000000000
2012-07-01	152.600000000000
2012-10-01	149.700000000000
2013-01-01	153.700000000000
2013-04-01	153.900000000000
2013-07-01	150.200000000000
2013-10-01	143.100000000000
2014-01-01	156.100000000000
2014-04-01	153.900000000000
2014-07-01	150.100000000000
2014-10-01	143.000000000000
2015-01-01	156.100000000000
2015-04-01	153.900000000000
2015-07-01	150.400000000000
2015-10-01	145.000000000000
2016-01-01	153.900000000000
2016-04-01	158.700000000000
2016-07-01	150.700000000000
2016-10-01	143.200000000000
2017-01-01	157.700000000000
2017-04-01	152.400000000000
2017-07-01	148.800000000000
2017-10-01	140.900000000000
2018-01-01	152.700000000000
2018-04-01	152.800000000000