Year	days
2005	215.1733870967742
2006	211.69444444444446
2007	211.79761904761904
2008	208.37698412698413
2009	199.8779527559055
2010	193.59448818897638
2011	187.85433070866142
2012	182.13565891472868
2013	175.9387591240876
2014	170.44282608695653
2015	169.04131386861314
2016	165.65350364963504
2017	163.92233576642337
2018	160.58094890510952
2019	157.4483211678832