Year	hours
2005	226
2006	231.97058823529412
2007	217.26315789473685
2008	215.1578947368421
2009	203
2010	197.6315789473684
2011	188.75
2012	220.0952380952381
2013	218.8095238095238
2014	215.04761904761904
2015	213.71428571428572
2016	208.04761904761904
2017	203.76190476190476
2018	198.39285714285714
2019	208.33333333333334