Year	days
2003	58.258426966292134
2004	55.24226804123711
2005	60.04017857142857
2006	56.530701754385966
2007	51.87719298245614
2008	48.14912280701754
2009	45.45652173913044
2010	43.3
2011	38.56956521739131
2012	37.67796610169491
2013	31.143968253968254
2014	28.03642857142857
2015	27.50236220472441
2016	26.59818897637795
2017	24.64570866141732
2018	22.897637795275585
2019	22.101771653543302