Year	Percent
1998-01-01	44.2344
1999-01-01	45.2059
2000-01-01	47.7000
2001-01-01	43.9000
2002-01-01	41.9528
2003-01-01	43.6623
2004-01-01	43.0704
2005-01-01	45.5282
2006-01-01	45.5291
2007-01-01	40.3909
2008-01-01	39.6641
2009-01-01	38.0564