Quarter	Millions of US Dollars
1982-01-01	40
1982-04-01	39
1982-07-01	37
1982-10-01	43
1983-01-01	42
1983-04-01	42
1983-07-01	102
1983-10-01	103
1984-01-01	127
1984-04-01	123
1984-07-01	142
1984-10-01	140
1985-01-01	480
1985-04-01	480
1985-07-01	515
1985-10-01	525
1986-01-01	539
1986-04-01	553
1986-07-01	562
1986-10-01	556
1987-01-01	571
1987-04-01	570
1987-07-01	571
1987-10-01	606
1988-01-01	602
1988-04-01	587
1988-07-01	586
1988-10-01	600
1989-01-01	589
1989-04-01	574
1989-07-01	579
1989-10-01	574
1990-01-01	559
1990-04-01	564
1990-07-01	581
1990-10-01	584
1991-01-01	542
1991-04-01	545
1991-07-01	453
1991-10-01	460
1992-01-01	453
1992-04-01	459
1992-07-01	465
1992-10-01	460
1993-01-01	470
1993-04-01	621
1993-07-01	762
1993-10-01	1296
1994-01-01	1465
1994-04-01	1540
1994-07-01	1704
1994-10-01	1901
1995-01-01	1924
1995-04-01	2009
1995-07-01	2293
1995-10-01	2338
1996-01-01	2574
1996-04-01	3321
1996-07-01	3857
1996-10-01	4302
1997-01-01	4460
1997-04-01	4509
1997-07-01	4666
1997-10-01	4722
1998-01-01	4670
1998-04-01	4656
1998-07-01	4601
1998-10-01	4960
1999-01-01	4701
1999-04-01	4863
1999-07-01	4745
1999-10-01	4761
2000-01-01	4752
2000-04-01	4669
2000-07-01	4477
2000-10-01	4255
2001-01-01	4024
2001-04-01	3805
2001-07-01	3685
2001-10-01	3331
2002-01-01	3275
2002-04-01	3319
2002-07-01	3285
2002-10-01	3348
2003-01-01	3350
2003-04-01	3184
2003-07-01	3085
2003-10-01	2672
2004-01-01	2475
2004-04-01	2145
2004-07-01	2481
2004-10-01	2498
2005-01-01	2294
2005-04-01	2851
2005-07-01	3497
2005-10-01	3791
2006-01-01	3769
2006-04-01	3515
2006-07-01	3519
2006-10-01	3582
2007-01-01	3484
2007-04-01	4017
2007-07-01	4246
2007-10-01	4144
2008-01-01	4184
2008-04-01	4313
2008-07-01	4315
2008-10-01	3987
2009-01-01	3955
2009-04-01	3965
2009-07-01	3992
2009-10-01	3979
2010-01-01	3975
2010-04-01	3996
2010-07-01	4022
2010-10-01	3763
2011-01-01	4085
2011-04-01	4093
2011-07-01	3999
2011-10-01	3990
2012-01-01	3973
2012-04-01	3978
2012-07-01	4527
2012-10-01	5334
2013-01-01	5972
2013-04-01	5961
2013-07-01	6466
2013-10-01	6175
2014-01-01	6471
2014-04-01	7478
2014-07-01	7134
2014-10-01	7102
2015-01-01	7105
2015-04-01	6437
2015-07-01	6421
2015-10-01	6417
2016-01-01	6445
2016-04-01	6475
2016-07-01	7448
2016-10-01	7376
2017-01-01	7408
2017-04-01	7838
2017-07-01	9479
2017-10-01	8977
2018-01-01	9099
2018-04-01	8972