Year days 2004 51 2005 51 2006 51 2007 51 2008 51 2009 51 2010 51 2011 51.5 2012 51.5 2013 51.5 2014 51.5 2015 51.5 2016 51.5 2017 51.5 2018 51.5 2019 51.5