Quarter	Millions of US Dollars
1989-10-01	261225
1990-01-01	266238
1990-04-01	277622
1990-07-01	322954
1990-10-01	360560
1991-01-01	327558
1991-04-01	314744
1991-07-01	355730
1991-10-01	406945
1992-01-01	393854
1992-04-01	440251
1992-07-01	507206
1992-10-01	489551
1993-01-01	532598
1993-04-01	536616
1993-07-01	584661
1993-10-01	587743
1994-01-01	629912
1994-04-01	669309
1994-07-01	711523
1994-10-01	731841
1995-01-01	829532
1995-04-01	831481
1995-07-01	814468
1995-10-01	813020
1996-01-01	795537
1996-04-01	785263
1996-07-01	795600
1996-10-01	796835
1997-01-01	754365
1997-04-01	744693
1997-07-01	733188
1997-10-01	735011
1998-01-01	722011
1998-04-01	749075
1998-07-01	813286
1998-10-01	826156
1999-01-01	776117
1999-04-01	749327
1999-07-01	788315
1999-10-01	754045
2000-01-01	724942
2000-04-01	730628
2000-07-01	673515
2000-10-01	726071
2001-01-01	671181
2001-04-01	650954
2001-07-01	717043
2001-10-01	705131
2002-01-01	712969
2002-04-01	838291
2002-07-01	856077
2002-10-01	911559
2003-01-01	982887
2003-04-01	1041425
2003-07-01	1069629
2003-10-01	1183469
2004-01-01	1186632
2004-04-01	1202460
2004-07-01	1243613
2004-10-01	1379672
2005-01-01	1331300
2005-04-01	1264775
2005-07-01	1277624
2005-10-01	1272592
2006-01-01	1317351
2006-04-01	1404008
2006-07-01	1415288
2006-10-01	1493822
2007-01-01	1507432
2007-04-01	1560451
2007-07-01	1619935
2007-10-01	1716991
2008-01-01	1833208
2008-04-01	1839795
2008-07-01	1689153
2008-10-01	1662707
2009-01-01	1639562
2009-04-01	1815676
2009-07-01	1882486
2009-10-01	1870274
2010-01-01	1785700
2010-04-01	1663534
2010-07-01	1876162
2010-10-01	2039952
2011-01-01	2154322
2011-04-01	2276521
2011-07-01	2148851
2011-10-01	2079168
2012-01-01	2171919
2012-04-01	2104563
2012-07-01	2156574
2012-10-01	2177570
2013-01-01	2086032
2013-04-01	2121355
2013-07-01	2193783
2013-10-01	2254725
2014-01-01	2249858
2014-04-01	2247009
2014-07-01	2076761
2014-10-01	1999896
2015-01-01	1756215
2015-04-01	1822279
2015-07-01	1832699
2015-10-01	1779140
2016-01-01	1853379
2016-04-01	1811201
2016-07-01	1832867
2016-10-01	1715105
2017-01-01	1721356
2017-04-01	1840730
2017-07-01	1902930
2017-10-01	1939322
2018-01-01	1969006