Year	days
2004	56.75
2005	56.588235294117645
2006	55.411764705882355
2007	50.8421052631579
2008	44.8421052631579
2009	43.578947368421055
2010	43.526315789473685
2011	41.8
2012	38.15
2013	36.7
2014	36.15
2015	35.975
2016	36.775
2017	34.875
2018	30.825
2019	27.15