Year	Percent
1999-01-01	26.340259550
2000-01-01	39.237251280
2001-01-01	3.007647991
2002-01-01	4.414463997
2003-01-01	6.035993576
2004-01-01	6.118285656
2005-01-01	10.709240910
2006-01-01	11.708705900
2007-01-01	10.804039000
2008-01-01	12.287981990
2009-01-01	7.650884628
2010-01-01	10.117858890
2011-01-01	11.133777620
2012-01-01	8.021982193
2013-01-01	8.792456627