Year Percent 1996-01-01 42.8571 1997-01-01 48.0000 1998-01-01 48.2759 1999-01-01 56.2500 2000-01-01 58.6207 2001-01-01 57.1429 2002-01-01 60.0000 2003-01-01 64.7059 2004-01-01 71.4286