Jan ( N = 487 )

Feb ( N = 446 )

Mar ( N = 496 )

Apr ( N = 480 )

May ( N = 497 )

Jun ( N = 472 )

Jul ( N = 492 )

Aug ( N = 496 )

Sep ( N = 479 )

Oct ( N = 489 )

Nov ( N = 478 )

Dec ( N = 495 )