Year	Hours Per Week
1992	39.8757
1993	40.2241
1994	39.755
1995	39.7866
1996	39.4312
1997	39.313
1998	39.1825
1999	39.179
2000	39.3658
2001	38.7693
2002	38.7232
2003	38.0202
2004	38.3851
2005	38.0826
2006	37.7943
2007	37.7322
2008	37.3696
2009	38.0948
2010	38.0754
2011	37.992
2012	38.3732
2013	37.9492
2014	38.2968
2015	38.2008
2016	37.941
2017	37.6414