Quarter	US Dollars, monthly level
1999-01-01	576839677820.2550
1999-04-01	574027875437.8141
1999-07-01	564184346994.2790
1999-10-01	635138407616.4090
2000-01-01	630892148104.1400
2000-04-01	626383635965.5280
2000-07-01	598759144230.0810
2000-10-01	655645642478.9810
2001-01-01	657463389311.1440
2001-04-01	624275417352.7530
2001-07-01	584985220885.4720
2001-10-01	618955022114.7650
2002-01-01	591679830984.4710
2002-04-01	645766671714.7200
2002-07-01	650322224047.9910
2002-10-01	717072607906.6660
2003-01-01	749753702416.1890
2003-04-01	778638204506.4509
2003-07-01	742934872842.7490
2003-10-01	869647567009.4921
2004-01-01	896655840473.7850
2004-04-01	921496062855.7860
2004-07-01	911987637342.2030
2004-10-01	1048326334358.6600
2005-01-01	1014753562158.9299
2005-04-01	1051649886032.6602
2005-07-01	1006517502503.2401
2005-10-01	1082057646715.4202
2006-01-01	1123828539077.0900
2006-04-01	1204963375529.0698
2006-07-01	1170728659375.7898
2006-10-01	1277867392682.1100
2007-01-01	1305372360406.9800
2007-04-01	1356991790768.8200
2007-07-01	1365535991489.6702
2007-10-01	1549301767353.1800
2008-01-01	1604083818602.9900
2008-04-01	1719862042902.4700
2008-07-01	1611508665643.9400
2008-10-01	1319094898694.3398
2009-01-01	1099078719994.3200
2009-04-01	1111449971137.4102
2009-07-01	1187878656532.4600
2009-10-01	1319065688109.0000
2010-01-01	1268767556561.5300
2010-04-01	1285682098447.9500
2010-07-01	1300488192676.7200
2010-10-01	1469041995743.8400
2011-01-01	1525166423093.2600
2011-04-01	1624432098819.2800
2011-07-01	1564088353098.2300
2011-10-01	1528229431235.2500
2012-01-01	1515015422419.0700
2012-04-01	1463079980423.9800
2012-07-01	1407390856537.7400
2012-10-01	1491333869119.3700
2013-01-01	1463446289758.9402
2013-04-01	1455288744023.4400
2013-07-01	1456412623544.1700
2013-10-01	1547096814585.4700
2014-01-01	1540801176226.3900
2014-04-01	1553831937819.6900
2014-07-01	1499962580919.2500
2014-10-01	1447675721788.9001
2015-01-01	1309811336935.8700
2015-04-01	1320197603328.6200
2015-07-01	1291614981755.2400
2015-10-01	1319136646748.3398
2016-01-01	1275156992024.6300
2016-04-01	1353405015066.3800
2016-07-01	1305636908297.0200
2016-10-01	1328645456652.1300
2017-01-01	1375623346270.1200
2017-04-01	1406832804937.7200
2017-07-01	1460437835424.3599
2017-10-01	1561722111276.0700
2018-01-01	1638488579747.2500
2018-04-01	1612048214928.8700