Year	days
2003	661.6428571428571
2004	655.1875
2005	657.5294117647059
2006	657.5294117647059
2007	651.7368421052631
2008	651.7368421052631
2009	646.4736842105264
2010	642.5263157894736
2011	635.65
2012	647.6190476190476
2013	647.6190476190476
2014	644.7619047619048
2015	643.3809523809524
2016	641
2017	638.7619047619048
2018	638.7619047619048
2019	638.7619047619048