Year	days
2003	38.891304347826086
2004	42.354166666666664
2005	42.5625
2006	45.28
2007	42.36
2008	41.42
2009	39.14
2010	36.18
2011	32.56
2012	33.65384615384615
2013	34.61724137931035
2014	30.844827586206897
2015	27.686206896551724
2016	25.70344827586207
2017	25.02068965517241
2018	23.372413793103448
2019	22.858620689655172