Year	hours
2005	277.8529411764706
2006	277.8529411764706
2007	276.44117647058823
2008	267.9117647058824
2009	230.5
2010	224.1764705882353
2011	223.47058823529412
2012	221.19444444444446
2013	230.425
2014	225.675
2015	222.25
2016	209.225
2017	205.74
2018	198.925
2019	195.1