Year	Hours per Week
2001-01-01	34.9
2002-01-01	33.8
2003-01-01	35.7
2004-01-01	36.0
2005-01-01	42.5
2006-01-01	38.7
2007-01-01	36.8
2008-01-01	36.4
2009-01-01	36.5
2010-01-01	35.0
2011-01-01	36.1
2012-01-01	35.0