Year	Percent
1989-01-01	5.876250000000000
1990-01-01	7.894070000000000
1991-01-01	15.315000000000000
1992-01-01	16.847800000000000
1993-01-01	17.911200000000000
1994-01-01	22.648400000000000
1995-01-01	18.462300000000000
1996-01-01	13.529100000000000
1997-01-01	12.331000000000000
1998-01-01	11.437500000000000
1999-01-01	9.925620000000000
2000-01-01	7.685930000000000
2001-01-01	7.220389999999999
2002-01-01	8.862210000000001
2003-01-01	11.435100000000000
2004-01-01	14.616700000000000
2005-01-01	19.053000000000000
2006-01-01	23.318800000000000
2007-01-01	22.963700000000000
2008-01-01	15.813900000000000
2009-01-01	15.892800000000000
2010-01-01	25.743500000000000
2011-01-01	30.656200000000000
2012-01-01	24.963700000000000
2013-01-01	24.151100000000000
2014-01-01	26.412600000000000
2015-01-01	26.705200000000000
2016-01-01	22.949900000000000
2017-01-01	21.153400000000000