Year	days
2005	227.9659090909091
2006	223.76666666666668
2007	222.3
2008	214.4111111111111
2009	202.94565217391303
2010	197.16304347826087
2011	185.14444444444445
2012	176.98888888888888
2013	165.92979591836735
2014	164.38119999999998
2015	162.5930612244898
2016	157.43259999999998
2017	160.6706
2018	154.78539999999998
2019	151.41989999999998