Year	days
2004	74.90217391304348
2005	73.54
2006	65.48076923076923
2007	61.654545454545456
2008	57.55357142857143
2009	51.6875
2010	43.973214285714285
2011	41.991379310344826
2012	38.228813559322035
2013	35.902419354838706
2014	35.906451612903226
2015	35.47096774193548
2016	38.41451612903226
2017	36.03548387096774
2018	35.614285714285714
2019	35.22539682539682