Quarter	Millions of US Dollars
1976-04-01	24
1976-07-01	49
1976-10-01	50
1977-01-01	50
1977-04-01	50
1977-07-01	50
1977-10-01	61
1978-01-01	61
1978-04-01	61
1978-07-01	62
1978-10-01	88
1979-01-01	87
1979-04-01	87
1979-07-01	87
1979-10-01	88
1980-01-01	87
1980-04-01	89
1980-07-01	90
1980-10-01	89
1981-01-01	88
1981-04-01	62
1981-07-01	62
1981-10-01	62
1982-01-01	62
1982-04-01	62
1982-07-01	61
1982-10-01	61
1983-01-01	61
1983-04-01	61
1983-07-01	61
1983-10-01	121
1984-01-01	121
1984-04-01	121
1984-07-01	121
1984-10-01	120
1985-01-01	120
1985-04-01	140
1985-07-01	144
1985-10-01	122
1986-01-01	125
1986-04-01	128
1986-07-01	130
1986-10-01	129
1987-01-01	131
1987-04-01	131
1987-07-01	131
1987-10-01	128
1988-01-01	128
1988-04-01	125
1988-07-01	97
1988-10-01	296
1989-01-01	294
1989-04-01	291
1989-07-01	292
1989-10-01	291
1990-01-01	288
1990-04-01	289
1990-07-01	292
1990-10-01	233
1991-01-01	232
1991-04-01	232
1991-07-01	234
1991-10-01	236
1992-01-01	234
1992-04-01	236
1992-07-01	238
1992-10-01	236
1993-01-01	240
1993-04-01	244
1993-07-01	244
1993-10-01	241
1994-01-01	537
1994-04-01	550
1994-07-01	551
1994-10-01	376
1995-01-01	713
1995-04-01	815
1995-07-01	855
1995-10-01	820
1996-01-01	795
1996-04-01	772
1996-07-01	894
1996-10-01	858
1997-01-01	810
1997-04-01	873
1997-07-01	1308
1997-10-01	1247
1998-01-01	1231
1998-04-01	1195
1998-07-01	1215
1998-10-01	1365
1999-01-01	1324
1999-04-01	1310
1999-07-01	1554
1999-10-01	1581
2000-01-01	1324
2000-04-01	1194
2000-07-01	1628
2000-10-01	1527
2001-01-01	1877
2001-04-01	1886
2001-07-01	1948
2001-10-01	1820
2002-01-01	1804
2002-04-01	2618
2002-07-01	2583
2002-10-01	2623
2003-01-01	2987
2003-04-01	2991
2003-07-01	3124
2003-10-01	3219
2004-01-01	2959
2004-04-01	3441
2004-07-01	3445
2004-10-01	3626
2005-01-01	3514
2005-04-01	3993
2005-07-01	3827
2005-10-01	3750
2006-01-01	3496
2006-04-01	3509
2006-07-01	3480
2006-10-01	3539
2007-01-01	3565
2007-04-01	3557
2007-07-01	3707
2007-10-01	3809
2008-01-01	4087
2008-04-01	4012
2008-07-01	3824
2008-10-01	3918
2009-01-01	3733
2009-04-01	3873
2009-07-01	3869
2009-10-01	3798
2010-01-01	3675
2010-04-01	3602
2010-07-01	3431
2010-10-01	3422
2011-01-01	3503
2011-04-01	2912
2011-07-01	2696
2011-10-01	2648
2012-01-01	2628
2012-04-01	2449
2012-07-01	2981
2012-10-01	3201
2013-01-01	2654
2013-04-01	2619
2013-07-01	2878
2013-10-01	2805
2014-01-01	2823
2014-04-01	2840
2014-07-01	3208
2014-10-01	3520
2015-01-01	4462
2015-04-01	4450
2015-07-01	4475
2015-10-01	4461
2016-01-01	4581
2016-04-01	4709
2016-07-01	5234
2016-10-01	4987
2017-01-01	6046
2017-04-01	6640
2017-07-01	6587
2017-10-01	6619
2018-01-01	6743
2018-04-01	6599