Quarter	Percent
1960-01-01	26636.858862639200
1960-04-01	31996.913897575200
1960-07-01	30656.900138841200
1960-10-01	30199.334465127100
1961-01-01	29382.252904923500
1961-04-01	32193.013472024000
1961-07-01	26211.976451333300
1961-10-01	34480.841840594300
1962-01-01	29545.669216964200
1962-04-01	34219.375741329100
1962-07-01	35918.905386552700
1962-10-01	39938.946662754700
1963-01-01	35167.190351165400
1963-04-01	39416.014464224405
1963-07-01	47750.246378301700
1963-10-01	49253.676449076400
1964-01-01	39938.946662754700
1964-04-01	44678.019711935900
1964-07-01	41997.992194467900
1964-10-01	61346.483540090500
1965-01-01	42292.141556141210
1965-04-01	45364.368222506990
1965-07-01	44383.870350262594
1965-10-01	63340.162546987400
1966-01-01	39121.865102551100
1966-04-01	43795.571626916004
1966-07-01	40167.729499611705
1966-10-01	43501.422265242600
1967-01-01	35592.072762471296
1967-04-01	39285.281414591800
1967-07-01	37160.869358062300
1967-10-01	40363.829074060595
1968-01-01	35297.923400797896
1968-04-01	38370.150067163700
1968-07-01	43958.987938956700
1968-10-01	64222.610632007400
1969-01-01	40135.046237203605
1969-04-01	44841.436023976596
1969-07-01	52031.753753768800
1969-10-01	54188.849072706500
1970-01-01	42194.091768916800
1970-04-01	47554.146803852804
1970-07-01	45200.951910466200
1970-10-01	58895.238859479500
1971-01-01	49351.726236300800
1971-04-01	52620.052477115400
1971-07-01	49515.142548341600
1971-10-01	66673.855312618300
1972-01-01	45919.983683445500
1972-04-01	49809.291910014900
1972-07-01	48011.712477566805
1972-10-01	65333.841553884300
1974-01-01	51999.070491360700
1974-04-01	50724.423257443000
1974-07-01	54384.948647155400
1974-10-01	50299.540846137100
1975-01-01	40298.462549244300
1975-04-01	42847.757017079704
1975-07-01	44906.802548792904
1975-10-01	49155.626661851995
1976-01-01	47782.929640709800
1976-04-01	46181.449782710600
1976-07-01	46442.915881975800
1976-10-01	47782.929640709800
1977-01-01	43370.689215610100
1977-04-01	38631.616166428896
1977-07-01	40331.145811652495
1977-10-01	42128.725244100504
1978-01-01	36866.719996389000
1978-04-01	37030.136308429700
1978-07-01	36735.986946756400
1978-10-01	42651.657442630800
1979-01-01	35690.122549695700
1979-04-01	36703.303684348200
1979-07-01	38272.100279939200
1979-10-01	40788.711485366500
1980-01-01	36785.992338240800
1980-04-01	37693.606535315100
1980-07-01	40065.757720898300
1980-10-01	44443.680720469500
1981-01-01	39696.763688310300
1981-04-01	38758.427224572500
1981-07-01	39133.304244393900
1981-10-01	39276.783766365705
1982-01-01	35350.216620650994
1982-04-01	30388.243721846200
1982-07-01	34290.298420754800
1982-10-01	39175.465652900400
1983-01-01	32344.336976973800
1983-04-01	31033.738154407100
1983-07-01	29697.973219786200
1983-10-01	31155.319890565403
1984-01-01	27948.111350454000
1984-04-01	25714.537197481300
1984-07-01	29317.213212731300
1984-10-01	31896.576281982198
1985-01-01	25499.808163459800
1985-04-01	28971.424296453100
1985-07-01	27609.839584529700
1985-10-01	40420.044285402600
1986-01-01	27635.986194456200
1986-04-01	28496.863326286800
1986-07-01	29069.800916301600
1986-10-01	33596.759592453900
1987-01-01	30054.874445283100
1987-04-01	32032.865486224100
1987-07-01	32009.660369914300
1987-10-01	35848.963204999300
1988-01-01	34318.406026425800
1988-04-01	33203.579945683900
1988-07-01	35055.086761105400
1988-10-01	38473.429176373400
1989-01-01	33905.943254835000
1989-04-01	31678.252089095700
1989-07-01	33185.930983983504
1989-10-01	32425.718300370000
1990-01-01	30870.975507614500
1990-04-01	30977.522943065100
1990-07-01	32232.887052161997
1990-10-01	35011.291189478500
1991-01-01	33339.869149925900
1991-04-01	31508.299124573400
1991-07-01	31359.590280616300
1991-10-01	31932.527870631100
1992-01-01	29104.445174454200
1992-04-01	25545.564730831200
1992-07-01	27577.809987369700
1992-10-01	37145.835057354500
1993-01-01	25503.403322324702
1993-04-01	24623.243065673300
1993-07-01	28724.012000023400
1993-10-01	33214.038589654500
1994-01-01	29327.671856701900
1994-04-01	29232.890395718200
1994-07-01	31661.256792643500
1994-10-01	33642.189327201200
1995-01-01	27216.006272511500
1995-04-01	28706.036205698900
1995-07-01	25536.740249981000
1995-10-01	26241.718220124698
1996-01-01	26793.084856950100
1996-04-01	25346.850495389700
1996-07-01	25909.656274057903
1996-10-01	27739.592136290000
1997-01-01	23962.387499780600
1997-04-01	25403.065706731697
1997-07-01	25753.757112371102
1997-10-01	29745.690782902000
1998-01-01	26410.037021526598
1998-04-01	26891.461476798600
1998-07-01	30852.019215417800
1998-10-01	44748.615558737496
1999-01-01	32356.756616688897
1999-04-01	27321.246377465803
1999-07-01	29076.337568783198
1999-10-01	32652.866974106700
2000-01-01	30600.000000000000
2000-04-01	33466.666666666700
2000-07-01	32833.333333333300
2000-10-01	33433.333333333300
2001-01-01	30866.666666666700
2001-04-01	29500.000000000000
2001-07-01	32833.333333333300
2001-10-01	33400.000000000000
2002-01-01	28600.000000000000
2002-04-01	30766.666666666700
2002-07-01	32299.999999999996
2002-10-01	33900.000000000000
2003-01-01	30533.333333333300
2003-04-01	32500.000000000000
2003-07-01	37033.333333333300
2003-10-01	37900.000000000000
2004-01-01	37033.333333333300
2004-04-01	40733.333333333300
2004-07-01	43000.000000000000
2004-10-01	46033.333333333300
2005-01-01	41633.333333333300
2005-04-01	45266.666666666700
2005-07-01	46800.000000000000
2005-10-01	50166.666666666700
2006-01-01	48566.666666666700
2006-04-01	50533.333333333300
2006-07-01	48366.666666666700
2006-10-01	53300.000000000000
2007-01-01	48566.666666666700
2007-04-01	47666.666666666700
2007-07-01	48100.000000000000
2007-10-01	46166.666666666700
2008-01-01	45066.666666666700
2008-04-01	41100.000000000000
2008-07-01	37500.000000000000
2008-10-01	35100.000000000000
2009-01-01	29433.333333333303
2009-04-01	29133.333333333300
2009-07-01	33100.000000000000
2009-10-01	35066.666666666700
2010-01-01	37400.000000000000
2010-04-01	40066.666666666700
2010-07-01	42400.000000000000
2010-10-01	39066.666666666700
2011-01-01	39333.333333333300
2011-04-01	42733.333333333300
2011-07-01	47066.666666666700
2011-10-01	43533.333333333300
2012-01-01	39233.333333333300
2012-04-01	40466.666666666700
2012-07-01	42600.000000000000
2012-10-01	38166.666666666700
2013-01-01	42266.666666666700
2013-04-01	31966.666666666700
2013-07-01	32200.000000000004
2013-10-01	34366.666666666700
2014-01-01	32633.333333333296
2014-04-01	30033.333333333300
2014-07-01	32633.333333333296
2014-10-01	31333.333333333300
2015-01-01	30033.333333333300
2015-04-01	32166.666666666700
2015-07-01	35200.000000000000
2015-10-01	37366.666666666700
2016-01-01	33266.666666666700
2016-04-01	37200.000000000000
2016-07-01	41800.000000000000
2016-10-01	42200.000000000000
2017-01-01	38500.000000000000
2017-04-01	40533.333333333300
2017-07-01	45300.000000000000
2017-10-01	41066.666666666700
2018-01-01	37133.333333333300
2018-04-01	37966.666666666700
2018-07-01	40700.000000000000