Year	days
2003	35.88409090909091
2004	32.25869565217391
2005	28.148000000000003
2006	27.11346153846154
2007	23.9
2008	21.587500000000002
2009	20.157142857142855
2010	19.08571428571429
2011	16.856896551724137
2012	16.944067796610167
2013	16.151612903225807
2014	14.906451612903227
2015	12.516129032258066
2016	12.438709677419356
2017	11.80161290322581
2018	12.455555555555556
2019	11.323809523809523