Year	days
2004	110.95
2005	113.5909090909091
2006	110.34782608695652
2007	110.04347826086956
2008	96.78260869565217
2009	90
2010	81.26086956521739
2011	79.69565217391305
2012	76.70833333333333
2013	67.25
2014	66.54166666666667
2015	71.12
2016	71.28
2017	70.84
2018	61.08
2019	58.52