Quarter	Millions of US Dollars
1989-10-01	236
1990-01-01	226
1990-04-01	214
1990-07-01	211
1990-10-01	207
1991-01-01	170
1991-04-01	150
1991-07-01	152
1991-10-01	159
1992-01-01	156
1992-04-01	181
1992-07-01	210
1992-10-01	201
1993-01-01	221
1993-04-01	235
1993-07-01	257
1993-10-01	277
1994-01-01	299
1994-04-01	319
1994-07-01	335
1994-10-01	346
1995-01-01	423
1995-04-01	462
1995-07-01	489
1995-10-01	536
1996-01-01	564
1996-04-01	589
1996-07-01	633
1996-10-01	677
1997-01-01	647
1997-04-01	641
1997-07-01	650
1997-10-01	667
1998-01-01	661
1998-04-01	690
1998-07-01	755
1998-10-01	773
1999-01-01	712
1999-04-01	683
1999-07-01	698
1999-10-01	658
2000-01-01	626
2000-04-01	626
2000-07-01	574
2000-10-01	609
2001-01-01	578
2001-04-01	555
2001-07-01	598
2001-10-01	577
2002-01-01	571
2002-04-01	653
2002-07-01	645
2002-10-01	627
2003-01-01	638
2003-04-01	669
2003-07-01	682
2003-10-01	495
2004-01-01	479
2004-04-01	477
2004-07-01	487
2004-10-01	534
2005-01-01	508
2005-04-01	301
2005-07-01	299
2005-10-01	293
2006-01-01	114
2006-04-01	120
2006-07-01	120
2006-10-01	124
2007-01-01	126
2007-04-01	0
2007-07-01	0
2007-10-01	0
2008-01-01	0
2008-04-01	0
2008-07-01	0
2008-10-01	2784
2009-01-01	2662
2009-04-01	2827
2009-07-01	2929
2009-10-01	2881
2010-01-01	2696
2010-04-01	4909
2010-07-01	5459
2010-10-01	5345
2011-01-01	5683
2011-04-01	5781
2011-07-01	5401
2011-10-01	5175
2012-01-01	6678
2012-04-01	6295
2012-07-01	6465
2012-10-01	6597
2013-01-01	7363
2013-04-01	7521
2013-07-01	10871
2013-10-01	8344
2014-01-01	8341
2014-04-01	8263
2014-07-01	7613
2014-10-01	7709
2015-01-01	6832
2015-04-01	7105
2015-07-01	7002
2015-10-01	6805
2016-01-01	7116
2016-04-01	6939
2016-07-01	6975
2016-10-01	6588
2017-01-01	8820
2017-04-01	9415
2017-07-01	9740
2017-10-01	9894
2018-01-01	10146