Quarter	Millions of US Dollars
1989-01-01	28349
1989-04-01	29466
1989-07-01	31351
1989-10-01	33259
1990-01-01	34237
1990-04-01	34396
1990-07-01	35759
1990-10-01	36722
1991-01-01	37027
1991-04-01	38554
1991-07-01	38907
1991-10-01	38902
1992-01-01	37253
1992-04-01	37934
1992-07-01	35770
1992-10-01	35793
1993-01-01	37139
1993-04-01	36437
1993-07-01	35664
1993-10-01	36209
1994-01-01	36305
1994-04-01	36512
1994-07-01	37687
1994-10-01	36822
1995-01-01	36551
1995-04-01	37986
1995-07-01	40029
1995-10-01	39823
1996-01-01	39908
1996-04-01	39971
1996-07-01	39839
1996-10-01	42201
1997-01-01	43818
1997-04-01	44220
1997-07-01	46243
1997-10-01	47056
1998-01-01	49114
1998-04-01	49953
1998-07-01	48848
1998-10-01	47421
1999-01-01	50915
1999-04-01	52972
1999-07-01	56225
1999-10-01	58521
2000-01-01	58681
2000-04-01	60690
2000-07-01	60768
2000-10-01	61323
2001-01-01	61096
2001-04-01	65693
2001-07-01	64270
2001-10-01	65201
2002-01-01	66950
2002-04-01	69172
2002-07-01	66379
2002-10-01	67562
2003-01-01	74668
2003-04-01	83083
2003-07-01	84289
2003-10-01	89329
2004-01-01	88579
2004-04-01	86826
2004-07-01	92127
2004-10-01	98686
2005-01-01	99025
2005-04-01	98371
2005-07-01	104447
2005-10-01	106454
2006-01-01	107077
2006-04-01	110502
2006-07-01	111967
2006-10-01	107414
2007-01-01	109655
2007-04-01	119597
2007-07-01	126665
2007-10-01	127923
2008-01-01	124328
2008-04-01	128087
2008-07-01	124459
2008-10-01	106031
2009-01-01	104738
2009-04-01	120093
2009-07-01	131181
2009-10-01	140770
2010-01-01	150764
2010-04-01	149088
2010-07-01	156011
2010-10-01	166778
2011-01-01	179480
2011-04-01	188408
2011-07-01	176881
2011-10-01	183070
2012-01-01	190309
2012-04-01	192489
2012-07-01	204725
2012-10-01	207116
2013-01-01	206032
2013-04-01	207391
2013-07-01	224379
2013-10-01	221907
2014-01-01	219205
2014-04-01	234406
2014-07-01	231787
2014-10-01	222141
2015-01-01	206635
2015-04-01	215408
2015-07-01	203571
2015-10-01	197141
2016-01-01	211146
2016-04-01	212487
2016-07-01	213392
2016-10-01	211750
2017-01-01	215009
2017-04-01	225776
2017-07-01	241501
2017-10-01	243358
2018-01-01	241541