Jan ( N = 52 )

Feb ( N = 46 )

Mar ( N = 56 )

Apr ( N = 60 )

May ( N = 57 )

Jun ( N = 50 )

Jul ( N = 60 )

Aug ( N = 57 )

Sep ( N = 60 )

Oct ( N = 48 )

Nov ( N = 38 )

Dec ( N = 61 )