Quarter	Percent
1997-03-31	2
1997-06-30	2
1997-09-30	2
1997-12-31	2
1998-03-31	1.9
1998-06-30	1.9
1998-09-30	1.9
1998-12-31	1.9
1999-03-31	44.5
1999-06-30	44.5
1999-09-30	43.7
1999-12-31	43.5
2000-03-31	41.8
2000-06-30	42.2
2000-09-30	40.9
2000-12-31	41
2001-03-31	38.9
2001-06-30	38.8
2001-09-30	37.8
2001-12-31	37.8
2002-03-31	36.7
2002-06-30	37.1
2002-09-30	36.7
2002-12-31	37.2
2003-03-31	36.6
2003-06-30	37.3
2003-09-30	37.6
2003-12-31	38.5
2004-03-31	38.4
2004-06-30	38.9
2004-09-30	38.8
2004-12-31	40.1