Year	days
2003	634.8461538461538
2004	642.6875
2005	638
2006	638
2007	634.45
2008	632.95
2009	627.95
2010	624.95
2011	624.95
2012	633.3809523809524
2013	633.3809523809524
2014	630.5238095238095
2015	626.6818181818181
2016	624.4090909090909
2017	622.2727272727273
2018	622.2727272727273
2019	622.2727272727273