Year	Percent
1990-01-01	88.46440000000000
1991-01-01	91.23910000000000
1992-01-01	91.96840000000000
1993-01-01	91.84690000000000
1994-01-01	94.44050000000000
1995-01-01	98.83370000000000
1996-01-01	100.70100000000001
1997-01-01	101.40000000000000
1998-01-01	103.62600000000000
1999-01-01	97.33400000000000
2000-01-01	88.83450000000000
2001-01-01	87.94600000000000
2002-01-01	88.20990000000000
2003-01-01	88.41980000000000
2004-01-01	78.59940000000000
2005-01-01	67.18800000000000
2006-01-01	60.88540000000000
2007-01-01	60.17770000000000
2008-01-01	57.73060000000000
2009-01-01	59.29150000000000
2010-01-01	61.31090000000000
2011-01-01	59.09740000000000