Year	days
2003	60.310344827586206
2004	55.970588235294116
2005	59.21621621621622
2006	56.36842105263158
2007	50.68421052631579
2008	50.13157894736842
2009	47.71052631578947
2010	44.18421052631579
2011	33.921052631578945
2012	32.46052631578947
2013	26.82894736842105
2014	23.539473684210527
2015	24.256410256410255
2016	23.666666666666668
2017	23.064102564102566
2018	23.102564102564102
2019	22.615384615384617