Year	days
2005	180.36
2006	177.59615384615384
2007	176.07272727272726
2008	182.85714285714286
2009	177.29464285714286
2010	173.51785714285714
2011	173.01724137931035
2012	166.51694915254237
2013	164.81854838709677
2014	161.10887096774192
2015	161.53709677419354
2016	158.71935483870968
2017	157.5016129032258
2018	156.57619047619048
2019	152.7531746031746