Quarter	Millions of US Dollars
1994-01-01	490
1994-04-01	591
1994-07-01	591
1994-10-01	590
1995-01-01	424
1995-04-01	423
1995-07-01	419
1995-10-01	418
1996-01-01	417
1996-04-01	416
1996-07-01	615
1996-10-01	613
1997-01-01	488
1997-04-01	476
1997-07-01	586
1997-10-01	551
1998-01-01	496
1998-04-01	503
1998-07-01	493
1998-10-01	807
1999-01-01	802
1999-04-01	998
1999-07-01	1018
1999-10-01	1033
2000-01-01	7120
2000-04-01	6543
2000-07-01	5982
2000-10-01	5492
2001-01-01	5180
2001-04-01	4771
2001-07-01	4647
2001-10-01	4522
2002-01-01	4263
2002-04-01	4170
2002-07-01	3960
2002-10-01	3563
2003-01-01	15567
2003-04-01	15911
2003-07-01	17436
2003-10-01	18099
2004-01-01	18191
2004-04-01	17387
2004-07-01	17588
2004-10-01	18982
2005-01-01	18571
2005-04-01	18506
2005-07-01	19351
2005-10-01	21614
2006-01-01	22937
2006-04-01	25494
2006-07-01	26749
2006-10-01	28200
2007-01-01	30828
2007-04-01	33305
2007-07-01	34593
2007-10-01	36241
2008-01-01	34324
2008-04-01	32872
2008-07-01	33475
2008-10-01	33443
2009-01-01	34130
2009-04-01	37696
2009-07-01	39983
2009-10-01	39858
2010-01-01	41340
2010-04-01	40904
2010-07-01	43106
2010-10-01	44376
2011-01-01	44813
2011-04-01	44254
2011-07-01	43838
2011-10-01	42867
2012-01-01	46574
2012-04-01	44500
2012-07-01	47994
2012-10-01	50117
2013-01-01	54837
2013-04-01	52998
2013-07-01	54562
2013-10-01	54109
2014-01-01	57581
2014-04-01	60109
2014-07-01	62877
2014-10-01	63610
2015-01-01	65924
2015-04-01	66651
2015-07-01	65293
2015-10-01	66469
2016-01-01	80138
2016-04-01	81827
2016-07-01	84145
2016-10-01	77629
2017-01-01	82003
2017-04-01	85667
2017-07-01	87553
2017-10-01	90136
2018-01-01	95552