Year	Hours Per Week
1992	40.3878
1993	40.216
1994	40.1707
1995	39.9238
1996	39.8628
1997	39.5081
1998	39.6541
1999	39.1869
2000	38.7495
2001	38.4407
2002	37.9057
2003	37.0318
2004	36.9789
2005	37.0218
2006	37.109
2007	37.0573
2008	37.069
2009	36.808
2010	37.1198
2011	37.1576
2012	36.9229
2013	36.1789
2014	36.0638
2015	36.1371
2016	36.3716
2017	36.2817