Year	Hours Per Week
1989	48
1990	47.9
1991	47.9
1992	48.7
1993	48.5
1994	48.2
1995	48
1996	47.9
1997	48
1998	48.4
1999	48.3
2000	48.1
2001	48.1
2002	47.8
2003	47.3
2004	48
2005	47.5
2006	47.1
2007	46.9
2008	46.9
2009	46
2010	47
2011	46
2012	46
2013	47
2014	47
2015	46
2016	46