Year	Hours Per Week
1990	41.8
1991	41.7
1992	41.5
1993	41.8
1994	42
1995	43.5
1996	42.7
1997	42.8
1998	42.9
1999	42.8
2000	42.2
2001	41.4
2002	39.2
2003	40
2004	39.5775
2005	40.1985
2006	40.2527
2008	40.6498
2009	39.7688
2010	40.1611
2011	40.2271
2012	39.2417
2013	38.9918
2014	38.4308
2016	42.88
2017	37.7022