Year	days
2009	107.71739130434783
2010	104.05434782608695
2011	103.56521739130434
2012	98.79787234042553
2013	103.3144117647059
2014	97.38833333333336
2015	91.35362745098041
2016	88.26107843137254
2017	85.39539215686273
2018	81.04196078431372
2019	78.42088235294116