Year	days
2005	207.17307692307693
2006	204.1320754716981
2007	201.62264150943398
2008	197.8490566037736
2009	191.77777777777777
2010	185.05555555555554
2011	181.44444444444446
2012	173.23214285714286
2013	169.78107142857144
2014	162.26321428571427
2015	159.06678571428571
2016	159.04981818181818
2017	153.30036363636364
2018	152.10036363636365
2019	151.70945454545455