Year	days
2003	68.18333333333334
2004	66.72857142857143
2005	67.76923076923077
2006	63.875
2007	58.925
2008	53.175
2009	51.35
2010	46.525
2011	36.175
2012	35.17857142857143
2013	31.099999999999998
2014	27.906976744186046
2015	28.329545454545453
2016	27.806818181818183
2017	27.363636363636363
2018	27.545454545454547
2019	26.727272727272727