Year	days
2003	563.4772727272727
2004	557.2826086956521
2005	569.84
2006	561.0192307692307
2007	557.6
2008	562.3035714285714
2009	566.3928571428571
2010	568.1785714285714
2011	589.2413793103449
2012	596.7118644067797
2013	597.0645161290323
2014	612.0645161290323
2015	609.6612903225806
2016	613.0645161290323
2017	613.0645161290323
2018	613.4920634920635
2019	613.4603174603175