Year	days
2003	55.970588235294116
2004	52.56944444444444
2005	63.71590909090909
2006	58.41111111111111
2007	53.82222222222222
2008	48.93333333333333
2009	45.858695652173914
2010	45.619565217391305
2011	43.75
2012	43.329787234042556
2013	32.7421568627451
2014	29.613529411764706
2015	28.764705882352942
2016	27.560392156862743
2017	23.908235294117645
2018	20.98254901960784
2019	20.31813725490196