Year	days
2004	92.63571428571429
2005	89.45597484276729
2006	83.89263803680981
2007	78.32228915662651
2008	70.8562874251497
2009	64.79166666666667
2010	57.92307692307692
2011	54.90643274853801
2012	53.35344827586207
2013	51.294918918918924
2014	49.743135135135134
2015	49.835913978494624
2016	50.55610215053763
2017	49.54088709677419
2018	47.836069518716585
2019	46.8501871657754