Year	Percent
1996-01-01	34.917000000000000
1997-01-01	31.733900000000000
1998-01-01	45.444500000000000
1999-01-01	46.222800000000000
2000-01-01	52.696000000000005
2001-01-01	56.081400000000000
2002-01-01	33.450000000000000
2003-01-01	32.295800000000000
2004-01-01	36.960900000000000
2005-01-01	40.142400000000000
2006-01-01	37.161600000000000
2007-01-01	36.984400000000000
2008-01-01	34.404200000000000
2009-01-01	26.901800000000000
2010-01-01	27.336800000000000
2011-01-01	23.726400000000000
2012-01-01	25.206300000000000
2013-01-01	22.251700000000000
2014-01-01	21.566100000000000