Year	days
2004	101.88709677419355
2005	97.20833333333333
2006	92.92272727272727
2007	87.00454545454545
2008	77.9090909090909
2009	71.62612612612612
2010	64.93303571428571
2011	61.60267857142857
2012	61.18421052631579
2013	59.103360655737696
2014	56.748196721311466
2015	57.051056910569095
2016	56.656382113821145
2017	56.320365853658544
2018	54.054024390243896
2019	52.754349593495924