Year	days
2003	39.803030303030305
2004	33.94117647058823
2005	27.485294117647058
2006	24.87142857142857
2007	22.414285714285715
2008	19.12857142857143
2009	17.82857142857143
2010	16.87142857142857
2011	15.014285714285714
2012	14.371428571428572
2013	12.415789473684208
2014	11.33421052631579
2015	10.51842105263158
2016	10.09736842105263
2017	10.09736842105263
2018	10.044736842105262
2019	9.481578947368419