Quarter	Millions of US Dollars
1989-10-01	184907
1990-01-01	191602
1990-04-01	204356
1990-07-01	222299
1990-10-01	237812
1991-01-01	222876
1991-04-01	219051
1991-07-01	240622
1991-10-01	265432
1992-01-01	254235
1992-04-01	281645
1992-07-01	308678
1992-10-01	280025
1993-01-01	290148
1993-04-01	288265
1993-07-01	308452
1993-10-01	299891
1994-01-01	319278
1994-04-01	338438
1994-07-01	354243
1994-10-01	362423
1995-01-01	418827
1995-04-01	427846
1995-07-01	423934
1995-10-01	438240
1996-01-01	444838
1996-04-01	442327
1996-07-01	449171
1996-10-01	451451
1997-01-01	433576
1997-04-01	434059
1997-07-01	436957
1997-10-01	443196
1998-01-01	457753
1998-04-01	488531
1998-07-01	525995
1998-10-01	526976
1999-01-01	526941
1999-04-01	559320
1999-07-01	604581
1999-10-01	586392
2000-01-01	582205
2000-04-01	594058
2000-07-01	587870
2000-10-01	634957
2001-01-01	629319
2001-04-01	645055
2001-07-01	694527
2001-10-01	701872
2002-01-01	714200
2002-04-01	820052
2002-07-01	816330
2002-10-01	892568
2003-01-01	993542
2003-04-01	1084373
2003-07-01	1142185
2003-10-01	1265758
2004-01-01	1253572
2004-04-01	1269264
2004-07-01	1291409
2004-10-01	1432664
2005-01-01	1398345
2005-04-01	1367238
2005-07-01	1372825
2005-10-01	1377464
2006-01-01	1431272
2006-04-01	1534840
2006-07-01	1549320
2006-10-01	1657886
2007-01-01	1775065
2007-04-01	1831957
2007-07-01	1944774
2007-10-01	2090073
2008-01-01	2254668
2008-04-01	2320168
2008-07-01	2148271
2008-10-01	2220945
2009-01-01	2206215
2009-04-01	2365398
2009-07-01	2462189
2009-10-01	2431016
2010-01-01	2340105
2010-04-01	2135175
2010-07-01	2388222
2010-10-01	2376844
2011-01-01	2499799
2011-04-01	2591439
2011-07-01	2419707
2011-10-01	2321684
2012-01-01	2424319
2012-04-01	2279302
2012-07-01	2327644
2012-10-01	2383579
2013-01-01	2310134
2013-04-01	2365321
2013-07-01	2432204
2013-10-01	2412228
2014-01-01	2367805
2014-04-01	2385337
2014-07-01	2214481
2014-10-01	2209761
2015-01-01	2026899
2015-04-01	2123622
2015-07-01	2115072
2015-10-01	2030555
2016-01-01	2104659
2016-04-01	2088093
2016-07-01	2121835
2016-10-01	1994118
2017-01-01	2070353
2017-04-01	2127859
2017-07-01	2180897
2017-10-01	2181018
2018-01-01	2254988