Year	Percent
1989-12-31	9.23
1990-12-31	9.99
1991-12-31	9.47
1992-12-31	10.28
1993-12-31	7.9
1994-12-31	5.9
1995-12-31	5.81
1996-12-31	4.27
1997-12-31	4.12
1998-12-31	3.89
1999-12-31	2.69
2000-12-31	4.25
2001-12-31	4.15
2002-12-31	3.2
2003-12-31	2.24
2004-12-31	2.02
2005-12-31	2.09