Year	Hours Per Week
1985	48.9
1986	48.9
1987	46.5
1988	47.5
1989	46.3
1990	45.6
1991	46.2
1992	44.5
1993	45.8
1994	45.8
1995	45.1
1996	46.1
1997	45.2
1998	45.2
1999	46
2000	46.6
2001	46.5
2002	46.9
2003	46.6
2004	47.1
2005	46.9
2006	46.3
2007	46.6
2008	45.6
2009	45
2010	46
2013	44
2014	44
2015	44