Year	Hours per Week
2001-01-01	29.5
2002-01-01	30.0
2003-01-01	30.2
2004-01-01	30.6
2005-01-01	32.5
2006-01-01	32.5
2007-01-01	32.0
2008-01-01	31.1
2009-01-01	30.2
2010-01-01	29.4
2011-01-01	30.7
2012-01-01	29.7