Jan ( N = 620 )

Feb ( N = 547 )

Mar ( N = 583 )

Apr ( N = 536 )

May ( N = 597 )

Jun ( N = 600 )

Jul ( N = 577 )

Aug ( N = 618 )

Sep ( N = 599 )

Oct ( N = 621 )

Nov ( N = 591 )

Dec ( N = 619 )