Quarter	US dollars
1999-03-31	52292
1999-06-30	57751
1999-09-30	72698
1999-12-31	72051
2000-03-31	73174
2000-06-30	73300
2000-09-30	71542
2000-12-31	74433
2001-03-31	75206
2001-06-30	73844
2001-09-30	79457
2001-12-31	77053
2002-03-31	75255
2002-06-30	84029
2002-09-30	98109
2002-12-31	112870
2003-03-31	115991
2003-06-30	119617
2003-09-30	125691
2003-12-31	137649
2004-03-31	157737
2004-06-30	158975
2004-09-30	169617
2004-12-31	193828
2005-03-31	191073
2005-06-30	192647
2005-09-30	208428
2005-12-31	206590
2006-03-31	235647
2006-06-30	239316
2006-09-30	257607
2006-12-31	275302
2007-03-31	305789
2007-06-30	344699
2007-09-30	391054
2007-12-31	383647
2008-03-31	403939
2008-06-30	403315
2008-09-30	362150
2008-12-31	336022
2009-03-31	348086
2009-06-30	399711
2009-09-30	425860
2009-12-31	425846
2010-03-31	412670
2010-06-30	369784
2010-09-30	415453
2010-12-31	378789
2011-03-31	404720
2011-06-30	413092
2011-09-30	384504
2011-12-31	343038
2012-03-31	339219
2012-06-30	313496
2012-09-30	307551
2012-12-31	292076
2013-03-31	270249
2013-06-30	248099
2013-09-30	246385
2013-12-31	239028
2014-03-31	244965
2014-06-30	257278
2014-09-30	248276
2014-12-31	232001
2015-03-31	221158
2015-06-30	228635
2015-09-30	230858
2015-12-31	214800
2016-03-31	219340
2016-06-30	221671