Jan ( N = 28 )

Feb ( N = 30 )

Mar ( N = 32 )

Apr ( N = 31 )

May ( N = 32 )

Jun ( N = 31 )

Jul ( N = 691 )

Aug ( N = 968 )

Sep ( N = 927 )

Oct ( N = 876 )

Nov ( N = 935 )

Dec ( N = 1012 )