Year	days
2003	58.69767441860465
2004	55.0625
2005	56.85849056603774
2006	53.9537037037037
2007	48.9537037037037
2008	44.26851851851852
2009	41.82727272727273
2010	39.13636363636363
2011	30.954545454545453
2012	29.842105263157894
2013	26.16896551724138
2014	24.267241379310345
2015	24.83050847457627
2016	24.28813559322034
2017	23.74576271186441
2018	23.847457627118644
2019	23.135593220338983