Year	Hours per Week
2001-01-01	32.8
2002-01-01	34.0
2003-01-01	34.5
2004-01-01	35.7
2005-01-01	38.8
2006-01-01	37.6
2007-01-01	34.3
2008-01-01	32.2
2009-01-01	33.5
2010-01-01	38.0
2011-01-01	38.2
2012-01-01	35.6
2013-01-01	34.3
2014-01-01	32.3
2015-01-01	34.2
2016-01-01	37.9