Year	Percent
1999-01-01	28.454540250
2000-01-01	18.896112440
2001-01-01	1.803629994
2002-01-01	11.840373990
2003-01-01	15.739556310
2004-01-01	10.984224320
2005-01-01	15.975093840
2006-01-01	12.729953770
2007-01-01	11.274385450
2008-01-01	12.821635250
2009-01-01	9.640945435
2010-01-01	11.435450550
2011-01-01	10.428774830
2012-01-01	9.921811104
2013-01-01	9.522511482