Year	hours
2005	356.53409090909093
2006	362.1
2007	355.81111111111113
2008	313.8722222222222
2009	300.8641304347826
2010	292.69565217391306
2011	285.7391304347826
2012	284.02127659574467
2013	329.9313725490196
2014	321.4019607843137
2015	317.5343137254902
2016	296.77352941176474
2017	291.32941176470587
2018	286.05882352941177
2019	275.6372549019608