Year	Percent
2000-01-01	30.413280
2001-01-01	29.754720
2002-01-01	31.039980
2003-01-01	33.711490
2004-01-01	33.255250
2005-01-01	34.252540
2006-01-01	33.851590
2007-01-01	34.953030
2008-01-01	39.101910
2009-01-01	40.286360
2010-01-01	44.314615