Quarter	Number of Permits
1960-01-01	11118.000000000000
1960-04-01	30364.000000000000
1960-07-01	35315.000000000000
1960-10-01	32061.000000000000
1961-01-01	16474.000000000000
1961-04-01	37885.000000000000
1961-07-01	38762.000000000000
1961-10-01	32456.000000000004
1962-01-01	16085.000000000000
1962-04-01	39923.000000000000
1962-07-01	40233.000000000000
1962-10-01	33854.000000000000
1963-01-01	17091.000000000000
1963-04-01	40387.000000000000
1963-07-01	44242.000000000000
1963-10-01	46904.000000000000
1964-01-01	23297.000000000000
1964-04-01	39972.000000000000
1964-07-01	47001.000000000000
1964-10-01	55388.000000000000
1965-01-01	22455.000000000000
1965-04-01	46055.000000000000
1965-07-01	49551.000000000000
1965-10-01	48504.000000000000
1966-01-01	23075.000000000000
1966-04-01	34748.000000000000
1966-07-01	37145.000000000000
1966-10-01	39506.000000000000
1967-01-01	17089.000000000000
1967-04-01	51548.000000000000
1967-07-01	52634.000000000000
1967-10-01	42852.000000000000
1968-01-01	26778.000000000000
1968-04-01	56894.000000000000
1968-07-01	52574.000000000000
1968-10-01	60632.000000000000
1969-01-01	38882.000000000000
1969-04-01	63748.000000000000
1969-07-01	58643.000000000000
1969-10-01	49142.000000000000
1970-01-01	24293.000000000000
1970-04-01	40189.000000000000
1970-07-01	54671.000000000000
1970-10-01	71375.000000000000
1971-01-01	29678.000000000000
1971-04-01	64673.000000000000
1971-07-01	70180.000000000000
1971-10-01	69122.000000000000
1972-01-01	38048.000000000000
1972-04-01	71663.000000000000
1972-07-01	73898.000000000000
1972-10-01	66305.000000000000
1973-01-01	38798.000000000000
1973-04-01	78533.000000000000
1973-07-01	79357.000000000000
1973-10-01	71841.000000000000
1974-01-01	43267.000000000000
1974-04-01	71899.000000000000
1974-07-01	60857.000000000000
1974-10-01	46100.000000000000
1975-01-01	23950.000000000000
1975-04-01	58784.000000000000
1975-07-01	72395.000000000000
1975-10-01	76327.000000000000
1976-01-01	43525.000000000000
1976-04-01	80540.000000000000
1976-07-01	76919.000000000000
1976-10-01	72219.000000000000
1977-01-01	35606.000000000000
1977-04-01	70369.000000000000
1977-07-01	72262.000000000000
1977-10-01	67487.000000000000
1978-01-01	47197.000000000000
1978-04-01	57103.000000000000
1978-07-01	63594.000000000000
1978-10-01	59773.000000000000
1979-01-01	32024.000000000000
1979-04-01	54910.000000000000
1979-07-01	54607.000000000000
1979-10-01	55508.000000000000
1980-01-01	27112.000000000000
1980-04-01	39825.000000000000
1980-07-01	45800.000000000000
1980-10-01	45864.000000000000
1981-01-01	28416.000000000000
1981-04-01	60276.000000000000
1981-07-01	50781.000000000000
1981-10-01	38500.000000000000
1982-01-01	30328.000000000000
1982-04-01	31965.000000000000
1982-07-01	26657.000000000000
1982-10-01	36910.000000000000
1983-01-01	27008.000000000000
1983-04-01	63666.000000000000
1983-07-01	36874.000000000000
1983-10-01	35097.000000000000
1984-01-01	25070.000000000000
1984-04-01	40571.000000000000
1984-07-01	37696.000000000000
1984-10-01	31563.000000000000
1985-01-01	23119.000000000000
1985-04-01	47103.000000000000
1985-07-01	47297.000000000000
1985-10-01	48307.000000000000
1986-01-01	29272.000000000000
1986-04-01	61292.000000000000
1986-07-01	56374.000000000000
1986-10-01	52847.000000000000
1987-01-01	41719.000000000000
1987-04-01	77549.000000000000
1987-07-01	69345.000000000000
1987-10-01	57373.000000000000
1988-01-01	35873.000000000000
1988-04-01	69214.000000000000
1988-07-01	61067.000000000000
1988-10-01	56408.000000000000
1989-01-01	38954.000000000000
1989-04-01	64321.000000000000
1989-07-01	58959.000000000000
1989-10-01	53148.000000000000
1990-01-01	39811.000000000000
1990-04-01	62346.000000000000
1990-07-01	44103.000000000000
1990-10-01	35370.000000000000
1991-01-01	17815.000000000000
1991-04-01	46495.000000000000
1991-07-01	48460.000000000000
1991-10-01	43427.000000000000
1992-01-01	27260.000000000000
1992-04-01	51797.000000000000
1992-07-01	47602.000000000000
1992-10-01	41612.000000000000
1993-01-01	23478.000000000000
1993-04-01	46815.000000000000
1993-07-01	44961.000000000000
1993-10-01	40189.000000000000
1994-01-01	23878.000000000000
1994-04-01	51387.000000000000
1994-07-01	43904.000000000000
1994-10-01	34888.000000000000
1995-01-01	19302.000000000000
1995-04-01	33090.000000000000
1995-07-01	30367.000000000000
1995-10-01	28174.000000000000
1996-01-01	16642.000000000000
1996-04-01	38435.000000000000
1996-07-01	37190.000000000000
1996-10-01	32445.999999999996
1997-01-01	22774.000000000000
1997-04-01	44503.000000000000
1997-07-01	42859.000000000000
1997-10-01	36904.000000000000
1998-01-01	23578.000000000000
1998-04-01	42093.000000000000
1998-07-01	37395.000000000000
1998-10-01	34373.000000000000
1999-01-01	23376.000000000000
1999-04-01	44936.000000000000
1999-07-01	41591.000000000000
1999-10-01	40065.000000000000
2000-01-01	25535.000000000000
2000-04-01	42746.000000000000
2000-07-01	43938.000000000000
2000-10-01	39434.000000000000
2001-01-01	27171.000000000000
2001-04-01	48414.000000000000
2001-07-01	43299.000000000000
2001-10-01	43849.000000000000
2002-01-01	36140.000000000000
2002-04-01	59160.000000000000
2002-07-01	55730.000000000000
2002-10-01	54004.000000000000
2003-01-01	38270.000000000000
2003-04-01	59150.000000000000
2003-07-01	62771.000000000000
2003-10-01	58235.000000000000
2004-01-01	39382.000000000000
2004-04-01	67378.000000000000
2004-07-01	65754.000000000000
2004-10-01	60917.000000000000
2005-01-01	37084.000000000000
2005-04-01	67183.000000000000
2005-07-01	62809.000000000000
2005-10-01	58405.000000000000
2006-01-01	43917.000000000000
2006-04-01	65229.000000000000
2006-07-01	60197.000000000000
2006-10-01	58052.000000000000
2007-01-01	40716.000000000000
2007-04-01	64614.999999999990
2007-07-01	67838.000000000000
2007-10-01	55174.000000000000
2008-01-01	43610.000000000000
2008-04-01	62087.000000000000
2008-07-01	58292.000000000000
2008-10-01	47067.000000000000
2009-01-01	23772.000000000000
2009-04-01	35798.000000000000
2009-07-01	42934.000000000000
2009-10-01	46577.000000000000
2010-01-01	35014.000000000000
2010-04-01	55287.000000000000
2010-07-01	52671.000000000000
2010-10-01	46958.000000000000
2011-01-01	33553.000000000000
2011-04-01	52625.000000000000
2011-07-01	55615.000000000000
2011-10-01	52157.000000000000
2012-01-01	39902.000000000000
2012-04-01	62025.000000000000
2012-07-01	60338.000000000000
2012-10-01	52562.000000000000
2013-01-01	33477.000000000000
2013-04-01	51259.000000000000
2013-07-01	52734.000000000000
2013-10-01	50453.000000000000
2014-01-01	33923.000000000000
2014-04-01	53281.000000000000
2014-07-01	53961.000000000000
2014-10-01	48164.000000000000
2015-01-01	35175.000000000000
2015-04-01	52248.000000000000
2015-07-01	57427.000000000000
2015-10-01	50685.000000000000
2016-01-01	38175.000000000000
2016-04-01	53286.000000000000
2016-07-01	54899.000000000000
2016-10-01	51555.000000000000
2017-01-01	42862.000000000000
2017-04-01	55085.000000000000
2017-07-01	61174.000000000000
2017-10-01	60642.000000000000
2018-01-01	44174.000000000000
2018-04-01	57726.000000000000
2018-07-01	53183.000000000000