Year	days
2004	122.11538461538461
2005	111.421875
2006	105.03076923076924
2007	96.38461538461539
2008	90.75384615384615
2009	87.43939393939394
2010	78.91044776119404
2011	75.38805970149254
2012	74.28985507246377
2013	74.01416666666667
2014	71.59750000000001
2015	72.59616438356164
2016	72.69205479452054
2017	71.62986301369862
2018	68.48054794520547
2019	66.56445205479451