Year	hours
2005	329.55
2006	332.25
2007	322.85
2008	315.9875
2009	304.8375
2010	305.3
2011	300.85
2012	293.4
2013	397.6818181818182
2014	393.25
2015	388.75
2016	357.1136363636364
2017	347.95454545454544
2018	348.6136363636364
2019	327.1136363636364