Year	hours
2005	224.11764705882354
2006	212.16666666666666
2007	206
2008	196.1578947368421
2009	189.26315789473685
2010	184.42105263157896
2011	171.5
2012	165.475
2013	165.425
2014	162.525
2015	161.125
2016	154.625
2017	151.1375
2018	150.025
2019	149.475