Year	Percent
1980-01-01	65.158500000000000
1981-01-01	65.948700000000000
1982-01-01	65.948700000000000
1983-01-01	112.505000000000000
1984-01-01	114.860000000000000
1985-01-01	157.777000000000020
1986-01-01	136.760000000000000
1987-01-01	150.657000000000000
1988-01-01	197.150999999999980
1989-01-01	187.753000000000000
1990-01-01	172.654000000000020
1991-01-01	90.541200000000000
1992-01-01	27.226999999999997
1993-01-01	48.508400000000000
1994-01-01	78.316500000000000
1995-01-01	90.372999999999990
1996-01-01	109.297999999999990
1997-01-01	156.152000000000020
1998-01-01	208.391000000000000
1999-01-01	195.280999999999980
2000-01-01	192.475000000000000
2001-01-01	219.521000000000000
2002-01-01	187.262000000000000
2003-01-01	144.235000000000000
2004-01-01	67.535500000000000
2005-01-01	12.274200000000000
2006-01-01	15.979000000000001
2007-01-01	138.306000000000000
2008-01-01	255.012000000000000
2009-01-01	200.490000000000000
2010-01-01	143.804000000000000
2011-01-01	133.019000000000000
2012-01-01	103.167000000000000
2013-01-01	94.450700000000000
2014-01-01	101.949000000000000
2015-01-01	121.821000000000000
2016-01-01	132.591000000000000
2017-01-01	131.916000000000000