Year	Percent
1981-01-01	-0.0333333333334032
1982-01-01	13.2960986995663000
1983-01-01	14.6126112868811000
1984-01-01	2.5422096681004700
1985-01-01	10.4238402303887000
1986-01-01	2.2451525116226600
1987-01-01	-6.9868027059997100
1988-01-01	-3.9644688207936900
1989-01-01	0.6890558073127320
1990-01-01	-0.0123304562272135
1991-01-01	-2.7623628067576100
1992-01-01	-1.0336081166777500
1993-01-01	-2.9153584929833700
1994-01-01	24.5710137275605000
1995-01-01	19.1894039735098000
1996-01-01	3.7249411032580200
1997-01-01	1.6113134776091200
1998-01-01	-1.8852009615791000
1999-01-01	-1.4142022008255300
2000-01-01	3.2034009156311400
2001-01-01	3.8348606023735900
2002-01-01	2.3318170351623500
2003-01-01	4.1347090515099600
2004-01-01	-2.0664060113630100
2005-01-01	2.8835207335902100
2006-01-01	6.6952646577335100
2007-01-01	0.9284121098467640
2008-01-01	9.2726185030087200
2009-01-01	3.5199020997036900
2010-01-01	1.4932337844144000
2011-01-01	1.3005699685467700
2012-01-01	5.7722505940246000
2013-01-01	1.5018451240095000
2014-01-01	25.2828106504709000
2015-01-01	37.1422148089365000