Year	Hours Per Week
1996	42.7135
1997	40.8846
1998	41.1068
1999	41.826
2000	41.4306
2001	40.5245
2002	40.8457
2003	40.4645
2004	40.1435
2005	40.7012
2006	40.0449
2007	40.1998
2008	40.0607
2009	39.4022
2010	39.1478
2011	38.9122
2012	39.0448
2013	39.0918
2014	39.1234
2015	39.1433
2016	38.9521
2017	38.1325