Year	days
2004	7
2005	4.5
2006	4.5
2007	4.5
2008	4.5
2009	4.5
2010	4.5
2011	4.5
2012	4.5
2013	4.5
2014	4.5
2015	4.5
2016	4.5
2017	3.5
2018	3.5
2019	4.5