Quarter	Millions of US Dollars
1989-01-01	94582
1989-04-01	104776
1989-07-01	108207
1989-10-01	113805
1990-01-01	110614
1990-04-01	116331
1990-07-01	123001
1990-10-01	127269
1991-01-01	128742
1991-04-01	136696
1991-07-01	141467
1991-10-01	137395
1992-01-01	136384
1992-04-01	143543
1992-07-01	138221
1992-10-01	136243
1993-01-01	138123
1993-04-01	143082
1993-07-01	134203
1993-10-01	133489
1994-01-01	129774
1994-04-01	131460
1994-07-01	132755
1994-10-01	123244
1995-01-01	125398
1995-04-01	132114
1995-07-01	134560
1995-10-01	126808
1996-01-01	130577
1996-04-01	126828
1996-07-01	121405
1996-10-01	107709
1997-01-01	106759
1997-04-01	96905
1997-07-01	92028
1997-10-01	84498
1998-01-01	87477
1998-04-01	74013
1998-07-01	65106
1998-10-01	63826
1999-01-01	71779
1999-04-01	65471
1999-07-01	72798
1999-10-01	73662
2000-01-01	77417
2000-04-01	68810
2000-07-01	61968
2000-10-01	60720
2001-01-01	64277
2001-04-01	63289
2001-07-01	63111
2001-10-01	68207
2002-01-01	67386
2002-04-01	79801
2002-07-01	75088
2002-10-01	75545
2003-01-01	81184
2003-04-01	92090
2003-07-01	93530
2003-10-01	102486
2004-01-01	94924
2004-04-01	97855
2004-07-01	102435
2004-10-01	109403
2005-01-01	113550
2005-04-01	108992
2005-07-01	113699
2005-10-01	119406
2006-01-01	124156
2006-04-01	125099
2006-07-01	121482
2006-10-01	119509
2007-01-01	128861
2007-04-01	126203
2007-07-01	128577
2007-10-01	134084
2008-01-01	127870
2008-04-01	143658
2008-07-01	147676
2008-10-01	165409
2009-01-01	171040
2009-04-01	184955
2009-07-01	203548
2009-10-01	202690
2010-01-01	200653
2010-04-01	186392
2010-07-01	194542
2010-10-01	203690
2011-01-01	197194
2011-04-01	203786
2011-07-01	193265
2011-10-01	189890
2012-01-01	190601
2012-04-01	198172
2012-07-01	214622
2012-10-01	210478
2013-01-01	205606
2013-04-01	212107
2013-07-01	220164
2013-10-01	192948
2014-01-01	165707
2014-04-01	180895
2014-07-01	166461
2014-10-01	157749
2015-01-01	133229
2015-04-01	145922
2015-07-01	138907
2015-10-01	134348
2016-01-01	133166
2016-04-01	146152
2016-07-01	139508
2016-10-01	128042
2017-01-01	128207
2017-04-01	145665
2017-07-01	138237
2017-10-01	125761
2018-01-01	115608