Year	Hours Per Week
1996	51.79
1997	45.31
1998	46.19
1999	46.19
2007	43.9924
2009	42.6039
2010	45
2011	42.7087
2012	41.7717
2013	40.9374
2014	40.3502
2015	40.8557
2016	41.2629
2017	40.3133