Quarter	US dollars
1997-09-30	42255
1997-12-31	39669
1998-03-31	37871
1998-06-30	36023
1998-09-30	36557
1998-12-31	36937
1999-03-31	35365
1999-06-30	34832
1999-09-30	34589
1999-12-31	30346
2000-03-31	35738
2000-06-30	41308
2000-09-30	42926
2000-12-31	48146
2001-03-31	42907
2001-06-30	42494
2001-09-30	43165
2001-12-31	39376
2002-03-31	38946
2002-06-30	43286
2002-09-30	42964
2002-12-31	42469
2003-03-31	42481
2003-06-30	42047
2003-09-30	45143
2003-12-31	46079
2004-03-31	45753
2004-06-30	44889
2004-09-30	45293
2004-12-31	49389
2005-03-31	47991
2005-06-30	47634
2005-09-30	46780
2005-12-31	46246
2006-03-31	47759
2006-06-30	47481
2006-09-30	49751
2006-12-31	51681
2007-03-31	51076
2007-06-30	51161
2007-09-30	51821
2007-12-31	57939
2008-03-31	61353
2008-06-30	60614
2008-09-30	53140
2008-12-31	53906
2009-03-31	49284
2009-06-30	52643
2009-09-30	65745
2009-12-31	66357
2010-03-31	69277