Jan ( N = 28 )

Feb ( N = 30 )

Mar ( N = 32 )

Apr ( N = 30 )

May ( N = 32 )

Jun ( N = 30 )

Jul ( N = 709 )

Aug ( N = 990 )

Sep ( N = 944 )

Oct ( N = 867 )

Nov ( N = 955 )

Dec ( N = 1040 )