Year	hours
2005	235.55555555555554
2006	241.19444444444446
2007	226.3
2008	224.3
2009	212.75
2010	207.4
2011	201.45
2012	232.1904761904762
2013	231.85714285714286
2014	229.9047619047619
2015	228.57142857142858
2016	202.23809523809524
2017	196.52380952380952
2018	196.29761904761904
2019	206.47619047619048