Year	Percent
1999-01-01	43.8543303992267
2000-01-01	44.4894195341872
2001-01-01	44.4409216294522
2002-01-01	44.5485762652309
2003-01-01	45.0342273397503
2004-01-01	45.0173988935206
2005-01-01	45.0441669208639
2006-01-01	45.5489421050051
2007-01-01	45.6845716887464
2008-01-01	45.0996036491420
2009-01-01	43.7782167807828
2010-01-01	43.3636769229611
2011-01-01	44.1651108477296
2012-01-01	44.8266745861293
2013-01-01	45.9106201492148