Year	days
2005	233.32456140350877
2006	228.3706896551724
2007	228.66379310344828
2008	223.02586206896552
2009	209.5948275862069
2010	202.56034482758622
2011	193.47413793103448
2012	188.7155172413793
2013	180.80593749999997
2014	175.5243076923077
2015	174.96296875
2016	171.05384615384614
2017	172.47
2018	166.9096923076923
2019	163.91861538461538