Year	Percent
1991-01-01	230.622494900178000
1992-01-01	211.205587610082000
1993-01-01	255.166861826698000
1994-01-01	136.759392815441000
1995-01-01	32.242484725759700
1996-01-01	38.829301338285200
1997-01-01	154.763480436309000
1998-01-01	59.096582754116700
1999-01-01	45.803781132636200
2000-01-01	45.666594044023800
2001-01-01	34.477012349352800
2002-01-01	22.539886260538600
2003-01-01	15.273488993625500
2004-01-01	11.874363593639900
2005-01-01	9.014912833438350
2006-01-01	6.558514122769830
2007-01-01	4.837329283139890
2008-01-01	7.850802557144830
2009-01-01	5.587420042643920
2010-01-01	6.091416686018920
2011-01-01	5.789253288158820
2012-01-01	3.334922676934430
2013-01-01	3.984712355481280
2014-01-01	1.068309876842930
2015-01-01	-0.594156437495137
2016-01-01	-1.544796668139040
2017-01-01	1.339021211043960