Year	Percent
1997-01-01	236.72299999999998
1998-01-01	292.24000000000000
1999-01-01	361.69900000000000
2000-01-01	296.40400000000000
2001-01-01	189.25799999999998
2002-01-01	141.00700000000000
2003-01-01	124.27799999999999
2004-01-01	100.90000000000000
2005-01-01	103.13500000000000
2006-01-01	105.63300000000000
2007-01-01	103.71300000000000
2008-01-01	30.76340000000000
2009-01-01	24.74620000000000
2010-01-01	20.09890000000000
2011-01-01	18.01830000000000
2012-01-01	20.47830000000000
2013-01-01	19.74920000000000
2014-01-01	19.81790000000000
2015-01-01	10.45920000000000
2016-01-01	15.60160000000000