Jan ( N = 622 )

Feb ( N = 550 )

Mar ( N = 582 )

Apr ( N = 534 )

May ( N = 597 )

Jun ( N = 601 )

Jul ( N = 580 )

Aug ( N = 618 )

Sep ( N = 601 )

Oct ( N = 621 )

Nov ( N = 590 )

Dec ( N = 619 )