Quarter	US dollars
1986-09-30	78303
1986-12-31	82237
1987-03-31	92251
1987-06-30	88242
1987-09-30	86007
1987-12-31	101129
1988-03-31	98918
1988-06-30	92848
1988-09-30	92213
1988-12-31	95057
1989-03-31	93953
1989-06-30	98081
1989-09-30	104107
1989-12-31	113861
1990-03-31	129261
1990-06-30	136945
1990-09-30	159199
1990-12-31	162738
1991-03-31	158185
1991-06-30	155057
1991-09-30	168817
1991-12-31	172249
1992-03-31	165435
1992-06-30	183059
1992-09-30	196533
1992-12-31	185911
1993-03-31	198285
1993-06-30	191841
1993-09-30	202566
1993-12-31	202993
1994-03-31	205539
1994-06-30	211986
1994-09-30	218060
1994-12-31	220424
1995-03-31	244747
1995-06-30	254332
1995-09-30	250199
1995-12-31	266492
1996-03-31	289920
1996-06-30	296961
1996-09-30	320781
1996-12-31	324788
1997-03-31	334137
1997-06-30	325252
1997-09-30	355439
1997-12-31	369041
1998-03-31	405097
1998-06-30	446077
1998-09-30	505834
1998-12-31	450751
1999-03-31	95186
1999-06-30	94453
1999-09-30	105201
1999-12-31	110599
2000-03-31	102976
2000-06-30	105792
2000-09-30	101293
2000-12-31	107435
2001-03-31	96863
2001-06-30	96155
2001-09-30	103000
2001-12-31	102948
2002-03-31	113908
2002-06-30	123932
2002-09-30	124826
2002-12-31	132456
2003-03-31	132233
2003-06-30	148975
2003-09-30	146240
2003-12-31	162854
2004-03-31	194978
2004-06-30	173164
2004-09-30	188683
2004-12-31	193614
2005-03-31	201675
2005-06-30	209962
2005-09-30	217192
2005-12-31	223698
2006-03-31	254664
2006-06-30	272189
2006-09-30	293257
2006-12-31	297764
2007-03-31	332053
2007-06-30	353761
2007-09-30	368020
2007-12-31	369497
2008-03-31	392354
2008-06-30	373313
2008-09-30	333768
2008-12-31	272578
2009-03-31	258900
2009-06-30	278809
2009-09-30	300534
2009-12-31	310291
2010-03-31	322581
2010-06-30	310649
2010-09-30	329324
2010-12-31	353108
2011-03-31	371804
2011-06-30	389862
2011-09-30	375042
2011-12-31	349505
2012-03-31	346016
2012-06-30	330741
2012-09-30	350514
2012-12-31	367340
2013-03-31	367329
2013-06-30	329053
2013-09-30	341535
2013-12-31	341991
2014-03-31	348763
2014-06-30	359724
2014-09-30	329221
2014-12-31	305392
2015-03-31	301591
2015-06-30	299745
2015-09-30	283925
2015-12-31	280503