Year	days
2004	93.36904761904762
2005	90.9186046511628
2006	76.35555555555555
2007	68.61111111111111
2008	55.891304347826086
2009	46.48936170212766
2010	36.03191489361702
2011	31.73404255319149
2012	28.28125
2013	25.658163265306122
2014	24.857142857142858
2015	23.46938775510204
2016	22.448979591836736
2017	22.53061224489796
2018	23.05
2019	23.69