Year	Hours Per Week
1992	39.3829
1993	39.4651
1994	39.3436
1995	39.4629
1996	38.8975
1997	39.3959
1998	39.3975
1999	39.3038
2000	39.2364
2001	39.3555
2002	35.8687
2003	39.0733
2004	38.5988
2005	38.2256
2006	38.1212
2007	38.1452
2008	37.8146
2009	37.375
2010	37.4728
2011	37.2012
2012	36.5272
2013	36.413
2014	36.3252
2015	36.4215
2016	36.5985
2017	36.6766