Year	Percent
1991-01-01	14.60130000000000
1992-01-01	14.57440000000000
1993-01-01	16.02160000000000
1994-01-01	19.47120000000000
1995-01-01	22.13050000000000
1996-01-01	25.87820000000000
1997-01-01	38.77430000000000
1998-01-01	50.34700000000000
1999-01-01	62.61700000000000
2000-01-01	59.49010000000000
2001-01-01	56.68890000000000
2002-01-01	82.76210000000000
2003-01-01	106.65799999999999
2004-01-01	123.51400000000000
2005-01-01	137.99800000000000
2006-01-01	122.46500000000000
2007-01-01	116.43799999999999
2008-01-01	118.62200000000001
2009-01-01	101.61800000000000
2010-01-01	47.49590000000000
2011-01-01	72.30860000000000
2012-01-01	107.30400000000000