Year	Hours Per Week
1992	41.5912
1993	42.0905
1994	41.8631
1995	42.2764
1996	41.4077
1997	40.521
1998	40.1063
1999	40.2615
2000	39.4172
2001	39.4138
2002	39.0888
2003	38.3445
2004	39.3473
2005	39.0224
2006	38.874
2007	38.546
2008	38.5208
2009	38.5594
2010	38.6517
2011	38.4721
2012	38.3238
2013	38.4902
2014	38.7181
2015	38.7941
2016	38.385
2017	38.4233