Year	Hours Per Week
1982	43.1
1983	42.4
1984	43.4
1985	43
1986	44.4
1987	44.4
1988	45.3
1989	44.3
1990	44.9
1991	45.2
1992	44.65
1993	44.49
1994	45.33
1995	44.82
1996	44.6
1997	44.05
1998	44.1
1999	43.5
2000	44.1
2001	43.7
2002	43.8
2003	43.5
2004	42.9
2005	42.1
2006	42.1
2007	41.7
2008	40.6
2009	43.0668
2010	42.1499
2011	41.9134
2012	41.5146
2013	41.4177
2014	41.0382
2015	41.0315
2016	40.8401
2017	40.3001