Year	days
2003	60.578947368421055
2004	59.74390243902439
2005	57.119565217391305
2006	55.59782608695652
2007	51.27173913043478
2008	49.71739130434783
2009	47.65217391304348
2010	43.76086956521739
2011	38.869565217391305
2012	37.861702127659576
2013	32.807843137254906
2014	28.79019607843137
2015	27.809803921568626
2016	27.037254901960786
2017	26.19019607843137
2018	24.576470588235296
2019	23.650980392156864