Year	days
2003	68.13333333333334
2004	66.65714285714286
2005	67.6923076923077
2006	63.8
2007	58.85
2008	53.1
2009	51.275
2010	46.45
2011	36.1
2012	35.107142857142854
2013	31.031162790697678
2014	27.837209302325583
2015	28.261363636363637
2016	27.738636363636363
2017	27.306818181818183
2018	27.488636363636363
2019	26.670454545454547