Year	days
2003	38.5
2004	49.588235294117645
2005	63.53333333333333
2006	63.1875
2007	57.76470588235294
2008	55.542857142857144
2009	53.31428571428572
2010	50.82857142857143
2011	43.86486486486486
2012	43.10526315789474
2013	29.17105263157895
2014	23.13157894736842
2015	20.07894736842105
2016	18.276315789473685
2017	17.960526315789473
2018	17.776315789473685
2019	16.973684210526315