Quarter	Percent
1997-03-31	175.4
1997-12-31	171.8
1998-03-31	167.5
1998-06-30	167.7
1998-09-30	164.4
1998-12-31	161.2
1999-03-31	38.9
1999-06-30	39.1
1999-09-30	38.3
1999-12-31	38.1
2000-03-31	36.3
2000-06-30	34.8
2000-09-30	32.8
2000-12-31	32.9
2001-03-31	31.3
2001-06-30	31.7
2001-09-30	30.8
2001-12-31	31.5
2002-03-31	30.3
2002-06-30	30.6
2002-09-30	30.5
2002-12-31	32.4
2003-03-31	31.6
2003-06-30	31.9
2003-09-30	31.9
2003-12-31	33.2
2004-03-31	32.9
2004-06-30	33.6
2004-09-30	33.6
2004-12-31	35