Year	Hours per Week
2001-01-01	27.9
2002-01-01	28.9
2003-01-01	28.7
2004-01-01	29.1
2005-01-01	30.1
2006-01-01	31.0
2007-01-01	30.7
2008-01-01	29.8
2009-01-01	28.8
2010-01-01	28.3
2011-01-01	29.6
2012-01-01	28.6