Jan ( N = 320 )

Feb ( N = 503 )

Mar ( N = 640 )

Apr ( N = 540 )

May ( N = 400 )

Jun ( N = 761 )

Jul ( N = 787 )

Aug ( N = 746 )

Sep ( N = 657 )

Oct ( N = 580 )

Nov ( N = 509 )

Dec ( N = 496 )