Year	Percent
2000-01-01	63.09275
2001-01-01	57.31467
2002-01-01	51.60030
2003-01-01	47.17350
2004-01-01	43.20389
2005-01-01	41.24601
2006-01-01	41.91138
2007-01-01	40.70905
2008-01-01	38.23314
2009-01-01	39.19046
2010-01-01	31.31071