Year	days
2003	35.84090909090909
2004	32.21739130434783
2005	28.11
2006	27.067307692307693
2007	23.845454545454544
2008	21.535714285714285
2009	20.107142857142858
2010	19.035714285714285
2011	16.810344827586206
2012	16.89830508474576
2013	16.105645161290322
2014	14.858870967741936
2015	12.468548387096776
2016	12.39274193548387
2017	11.755645161290323
2018	12.410317460317462
2019	11.284920634920635