Year	days
2004	86.28571428571429
2005	81
2006	80.1875
2007	79.5
2008	48.25
2009	41.294117647058826
2010	37.588235294117645
2011	32.529411764705884
2012	29.205882352941178
2013	25.38235294117647
2014	23.470588235294116
2015	21.705882352941178
2016	20.058823529411764
2017	20.470588235294116
2018	20.352941176470587
2019	20.323529411764707