Year	days
2003	38.5
2004	49.61764705882353
2005	63.55
2006	63.21875
2007	57.80588235294118
2008	55.582857142857144
2009	53.35142857142857
2010	50.86571428571428
2011	43.9
2012	43.13947368421052
2013	29.205263157894734
2014	23.16842105263158
2015	20.11578947368421
2016	18.310526315789474
2017	17.99473684210526
2018	17.79736842105263
2019	16.99473684210526