Jan ( N = 507 )

Feb ( N = 459 )

Mar ( N = 503 )

Apr ( N = 492 )

May ( N = 442 )

Jun ( N = 466 )

Jul ( N = 336 )

Aug ( N = 504 )

Sep ( N = 492 )

Oct ( N = 504 )

Nov ( N = 489 )

Dec ( N = 509 )