Year	Percent
1989-01-01	3.0501400000000003
1990-01-01	7.5382700000000000
1991-01-01	9.4312300000000010
1992-01-01	6.5369500000000000
1993-01-01	15.9386000000000000
1994-01-01	14.4174000000000000
1995-01-01	10.5006000000000000
1996-01-01	11.1375000000000000
1997-01-01	18.0771000000000000
1998-01-01	13.6288000000000000
1999-01-01	22.5828000000000000
2000-01-01	27.8269999999999980
2001-01-01	21.5491000000000000
2002-01-01	16.2593000000000000
2003-01-01	16.8133000000000000
2004-01-01	20.8566000000000000
2005-01-01	26.0125000000000000
2006-01-01	28.2358000000000000
2007-01-01	33.8117000000000000
2008-01-01	27.1834000000000000
2009-01-01	25.1203000000000000
2010-01-01	35.3756000000000000
2011-01-01	28.2158000000000000
2012-01-01	28.3197000000000000
2013-01-01	26.3041000000000000
2014-01-01	21.1232000000000000
2015-01-01	21.4347000000000000
2016-01-01	19.8055000000000000
2017-01-01	21.6560000000000000