Year	days
2003	606.5895522388059
2004	619.6597222222222
2005	636.0490797546013
2006	633.6287425149701
2007	630.8941176470588
2008	634.8830409356725
2009	627.953488372093
2010	626.6918604651163
2011	633.419540229885
2012	639.3089887640449
2013	648.9958730158729
2014	652.8583068783068
2015	652.0748421052631
2016	653.8837894736841
2017	651.7532631578946
2018	651.5922513089005
2019	649.7039267015706