Year	Percent
1983-01-01	42.003400000000000
1984-01-01	32.480800000000000
1985-01-01	32.094100000000000
1986-01-01	30.645000000000000
1987-01-01	34.246000000000000
1988-01-01	37.079000000000000
1989-01-01	34.742000000000000
1990-01-01	53.615400000000000
1991-01-01	48.568999999999996
1992-01-01	91.407600000000000
1993-01-01	123.041000000000000
1994-01-01	55.975700000000000
1995-01-01	51.653400000000000
1996-01-01	41.641400000000000
1997-01-01	49.382400000000000
1998-01-01	77.318200000000000
1999-01-01	97.390600000000000
2000-01-01	79.958500000000000
2001-01-01	101.456000000000000
2002-01-01	93.386800000000000
2003-01-01	92.523200000000000
2004-01-01	85.648300000000000
2005-01-01	98.782100000000000
2006-01-01	179.119000000000030
2007-01-01	156.198999999999980
2008-01-01	132.093000000000000
2009-01-01	146.222999999999980
2010-01-01	164.904000000000020
2011-01-01	182.522000000000020
2012-01-01	175.364000000000000
2013-01-01	176.615000000000000
2014-01-01	152.683000000000000
2015-01-01	157.718000000000000
2016-01-01	156.185000000000000