Quarter	US Dollars, monthly level
1999-01-01	458363422.77009404
1999-04-01	478185784.18461000
1999-07-01	493936759.21945200
1999-10-01	510988596.41251105
2000-01-01	558512320.96616100
2000-04-01	602184625.77240600
2000-07-01	574301385.31327800
2000-10-01	607670992.46124300
2001-01-01	605131841.36302100
2001-04-01	669589855.08553600
2001-07-01	603633205.63389400
2001-10-01	621198867.97573400
2002-01-01	610677255.41839400
2002-04-01	699459492.11516000
2002-07-01	719327205.40646100
2002-10-01	721512526.36027000
2003-01-01	709192933.83454690
2003-04-01	805188869.91023600
2003-07-01	790266756.79885210
2003-10-01	843619469.32296100
2004-01-01	887498129.99278700
2004-04-01	1027532512.41862010
2004-07-01	1091969824.33743000
2004-10-01	1187793508.87844000
2005-01-01	1186768591.03640000
2005-04-01	1315502825.41721000
2005-07-01	1290476364.24237000
2005-10-01	1364388851.30521000
2006-01-01	1289993540.11445000
2006-04-01	1547629391.33110000
2006-07-01	1611711807.99711000
2006-10-01	1716349590.15726020
2007-01-01	1773278664.26497000
2007-04-01	2056244037.12156990
2007-07-01	2124908873.00415000
2007-10-01	2368849084.66723000
2008-01-01	2460052788.81805000
2008-04-01	2732847994.08155000
2008-07-01	2795360364.95704030
2008-10-01	2159940642.93228000
2009-01-01	1634993934.48945000
2009-04-01	1788985206.60136000
2009-07-01	1986734874.78646000
2009-10-01	2318545423.75171000
2010-01-01	1981652841.46962000
2010-04-01	2213423975.05467000
2010-07-01	2536229481.56321000
2010-10-01	2793302227.34008000
2011-01-01	2772419463.86205000
2011-04-01	3310356946.37613000
2011-07-01	3525285627.18624000
2011-10-01	3649137096.55728000
2012-01-01	3160445382.93429000
2012-04-01	3277178370.62813000
2012-07-01	3621606507.57155000
2012-10-01	4053689360.82068000
2013-01-01	3366655520.86272000
2013-04-01	3446717143.03500000
2013-07-01	3656172932.16228960
2013-10-01	4005112508.93765970
2014-01-01	3545773834.01280980
2014-04-01	3568407408.97558000
2014-07-01	3656173571.12597000
2014-10-01	3760310287.09827000
2015-01-01	2914043525.14548000
2015-04-01	2921114755.69799000
2015-07-01	3092306171.19155030
2015-10-01	3204783054.82337000
2016-01-01	2737788722.96489000
2016-04-01	3030297229.16304000
2016-07-01	3117902323.40160000
2016-10-01	3257991015.79037000
2017-01-01	3060838704.10992000
2017-04-01	3258435542.81745000
2017-07-01	3696169271.88705000
2017-10-01	3991484220.14893000
2018-01-01	3798086187.37188000
2018-04-01	3934578246.80324030