Year	days
2003	74.3157894736842
2004	67.5
2005	74.79310344827586
2006	70.65517241379311
2007	64.3
2008	63.46666666666667
2009	61.78333333333333
2010	58.4
2011	53.95161290322581
2012	53.435483870967744
2013	35.6530303030303
2014	30.803030303030305
2015	31.72393939393939
2016	32.17818181818182
2017	31.935757575757577
2018	28.759393939393938
2019	28.091969696969695