Year	Percent
1989-01-01	5.494290000000000
1990-01-01	5.296090000000000
1991-01-01	5.146680000000000
1992-01-01	6.348269999999999
1993-01-01	15.752300000000000
1994-01-01	30.392900000000000
1995-01-01	30.101600000000000
1996-01-01	15.218200000000000
1997-01-01	13.794400000000000
1998-01-01	13.975000000000000
1999-01-01	12.594700000000000
2000-01-01	9.488880000000000
2001-01-01	8.780230000000000
2002-01-01	9.358889999999999
2003-01-01	19.240900000000000
2004-01-01	25.272400000000000
2005-01-01	28.027800000000000
2006-01-01	35.730800000000000
2007-01-01	39.961999999999996
2008-01-01	35.842100000000000
2009-01-01	27.950500000000000
2010-01-01	31.149300000000000
2011-01-01	28.356900000000000
2012-01-01	25.351600000000000