Year	days
2003	590.3529411764706
2004	650.8888888888889
2005	646.3888888888889
2006	646.3888888888889
2007	637.5
2008	638.5555555555555
2009	617.4444444444445
2010	610.7777777777778
2011	601.8888888888889
2012	630.9473684210526
2013	619.7738095238095
2014	619.7738095238095
2015	619.7738095238095
2016	619.7738095238095
2017	615.5928571428572
2018	615.5928571428572
2019	615.5928571428572