Jan ( N = 557 )

Feb ( N = 492 )

Mar ( N = 508 )

Apr ( N = 539 )

May ( N = 558 )

Jun ( N = 536 )

Jul ( N = 549 )

Aug ( N = 535 )

Sep ( N = 536 )

Oct ( N = 556 )

Nov ( N = 539 )

Dec ( N = 540 )