Year	Hours Per Week
1998	42.5435
1999	41.6569
2000	40.5542
2001	40.0007
2002	39.5974
2003	38.8248
2004	38.6269
2005	38.8725
2006	38.9076
2007	39.3892
2008	39.9012
2009	39.2453
2010	39.1634
2011	38.994
2012	38.8051
2013	38.8517
2014	38.8419
2015	38.7557
2016	38.8644
2017	38.3094