Quarter	US dollars
1986-09-30	191817
1986-12-31	199347
1987-03-31	205914
1987-06-30	212888
1987-09-30	220811
1987-12-31	238415
1988-03-31	235696
1988-06-30	236575
1988-09-30	237898
1988-12-31	249074
1989-03-31	254711
1989-06-30	252465
1989-09-30	258895
1989-12-31	267050
1990-03-31	278923
1990-06-30	288840
1990-09-30	323610
1990-12-31	336487
1991-03-31	326418
1991-06-30	309916
1991-09-30	327420
1991-12-31	316481
1992-03-31	300193
1992-06-30	312990
1992-09-30	323217
1992-12-31	296129
1993-03-31	297039
1993-06-30	289991
1993-09-30	291598
1993-12-31	279713
1994-03-31	284203
1994-06-30	292878
1994-09-30	300938
1994-12-31	294640
1995-03-31	309918
1995-06-30	310898
1995-09-30	318879
1995-12-31	331719
1996-03-31	361207
1996-06-30	362356
1996-09-30	369605
1996-12-31	369615
1997-03-31	398515
1997-06-30	409237
1997-09-30	419140
1997-12-31	427817
1998-03-31	432400
1998-06-30	447654
1998-09-30	493291
1998-12-31	427022
1999-03-31	479651
1999-06-30	486415
1999-09-30	491378
1999-12-31	461410
2000-03-31	509444
2000-06-30	504369
2000-09-30	487892
2000-12-31	486334
2001-03-31	537061
2001-06-30	533228
2001-09-30	546095
2001-12-31	541149
2002-03-31	571870
2002-06-30	594185
2002-09-30	643937
2002-12-31	670377
2003-03-31	724698
2003-06-30	763822
2003-09-30	826211
2003-12-31	897612
2004-03-31	989588
2004-06-30	974457
2004-09-30	1056805
2004-12-31	1163397
2005-03-31	1244810
2005-06-30	1235371
2005-09-30	1260569
2005-12-31	1236289
2006-03-31	1383214
2006-06-30	1482268
2006-09-30	1536015
2006-12-31	1539115
2007-03-31	1732147
2007-06-30	1872481
2007-09-30	2024022
2007-12-31	2075662
2008-03-31	2228217
2008-06-30	2253623
2008-09-30	2167797
2008-12-31	1758026
2009-03-31	1802136
2009-06-30	1863401
2009-09-30	1875849
2009-12-31	1853008
2010-03-31	1897219
2010-06-30	1833511
2010-09-30	2006345
2010-12-31	1980204
2011-03-31	2110420
2011-06-30	2173510
2011-09-30	2053654
2011-12-31	1951484
2012-03-31	2068227
2012-06-30	2008534
2012-09-30	2008007
2012-12-31	1978826
2013-03-31	1966133
2013-06-30	2020880
2013-09-30	1972257
2013-12-31	1899131
2014-03-31	1915446
2014-06-30	1913448
2014-09-30	1880721
2014-12-31	1821065
2015-03-31	1767276
2015-06-30	1766076
2015-09-30	1765669
2015-12-31	1651923