Year	days
2003	78.05555555555556
2004	70.6842105263158
2005	77.21428571428571
2006	72.92857142857143
2007	67.55357142857143
2008	66.66071428571429
2009	64.85714285714286
2010	61.482142857142854
2011	56.6551724137931
2012	56.10344827586207
2013	37.001612903225805
2014	31.838709677419356
2015	32.65774193548387
2016	33.38322580645162
2017	33.12516129032259
2018	29.743870967741934
2019	29.355967741935487