Year	days
2003	50.86363636363637
2004	46.13636363636363
2005	36.59090909090909
2006	33.95454545454545
2007	28.227272727272727
2008	24.5
2009	19.454545454545453
2010	18.90909090909091
2011	19.09090909090909
2012	18.90909090909091
2013	17.90909090909091
2014	16.818181818181817
2015	16.09090909090909
2016	15.727272727272727
2017	15.727272727272727
2018	18
2019	15.909090909090908