Jan ( N = 31 )

Feb ( N = 28 )

Mar ( N = 31 )

Apr ( N = 30 )

May ( N = 31 )

Jun ( N = 66 )

Aug ( N = 7 )

Sep ( N = 202 )

Oct ( N = 1502 )

Nov ( N = 1459 )

Dec ( N = 1515 )