Year	Hours Per Week
2002	40.6
2003	41.7
2004	42.5
2005	42
2006	41.3
2007	41.1
2008	42.1
2009	41.7
2010	42
2011	41.5
2012	41.7
2013	41.6
2015	41.2718
2016	42.0903
2017	42.8941