Year	days
2004	31.5
2005	31.5
2006	31.5
2007	31.5
2008	31.5
2009	31.5
2010	20.5
2011	20.5
2012	20.5
2013	20.5
2014	20.5
2015	20.5
2016	20.5
2017	20.5
2018	20.5
2019	20.5