Year	days
2009	124.84347826086956
2010	115.74782608695652
2011	113.96521739130435
2012	112.5677966101695
2013	113.51642857142858
2014	107.71119047619048
2015	99.21195121951219
2016	97.07829268292683
2017	94.36853658536585
2018	90.37626016260161
2019	88.07260162601625
