Year	Percent
1972-01-01	6.074999999515110
1973-01-01	8.343153429472180
1974-01-01	23.167283010324700
1975-01-01	10.490992582377200
1976-01-01	7.656649616245110
1977-01-01	4.528582034622270
1978-01-01	5.799999998999600
1979-01-01	5.765595463193380
1980-01-01	12.064343163646100
1981-01-01	8.054226476141050
1982-01-01	5.535055350553480
1983-01-01	7.902097901398610
1984-01-01	7.420609203547890
1985-01-01	3.710407239819060
1986-01-01	5.453752181500870
1987-01-01	3.337470693697180
1988-01-01	5.445082076604660
1989-01-01	4.480445513226580
1990-01-01	6.953361599030710
1991-01-01	6.965681277607580
1992-01-01	4.309614570097440
1993-01-01	4.974114303116460
1994-01-01	2.852722173871330
1995-01-01	17.280932681459000
1996-01-01	11.624178290844800
1997-01-01	3.964378052284090
1998-01-01	13.574191765680900
1999-01-01	14.932181740770100
2000-01-01	15.595893310753500
2001-01-01	9.298173327839700
2002-01-01	11.799447097260600
2003-01-01	14.709077966355700
2004-01-01	2.158931312669470
2005-01-01	1.780804399258280
2006-01-01	2.368462384168300
2007-01-01	0.911350455675219
2008-01-01	10.761418232682700
2009-01-01	6.918325326012220
2010-01-01	6.013608935678590
2011-01-01	4.440834010289760
2012-01-01	4.537205081669690
2013-01-01	4.960317460317440
2014-01-01	5.222117202268440
2015-01-01	5.995957781271050
2016-01-01	6.673728813559330