Year	Hours Per Week
1991	48.22
1992	47.77
1993	48.23
1994	48.29
1995	47.86
1996	47.99
1997	47.53
1998	47.04
1999	46.7
2000	45.3
2009	46.2
2010	45.1839
2011	44.7802
2012	44.3332
2013	44.057
2014	43.8887
2015	43.6366
2016	43.7104
2017	43.396