Jan ( N = 60 )

Feb ( N = 53 )

Mar ( N = 60 )

Apr ( N = 59 )

May ( N = 61 )

Jun ( N = 52 )

Jul ( N = 60 )

Aug ( N = 42 )

Sep ( N = 38 )

Oct ( N = 53 )

Nov ( N = 49 )

Dec ( N = 59 )