Year	Hours Per Week
1992	41.624
1993	41.0155
1994	40.8646
1995	40.1866
1996	40.6834
1997	40.0325
1998	39.6744
1999	39.4093
2000	39.0558
2001	38.6137
2002	38.0997
2003	37.5403
2004	37.3654
2005	37.6626
2006	37.4676
2007	36.8474
2008	36.2435
2009	35.2527
2010	35.1577
2011	35.0883
2012	35.1353
2013	35.338
2014	35.3991
2015	35.3618
2016	35.5979
2017	36.091