Year	days
2003	68.23333333333333
2004	66.8
2005	67.84615384615384
2006	63.95
2007	59
2008	53.25
2009	51.425
2010	46.6
2011	36.25
2012	35.25
2013	31.1706976744186
2014	27.976744186046513
2015	28.397727272727273
2016	27.875
2017	27.420454545454547
2018	27.602272727272727
2019	26.78409090909091