Jan ( N = 483 )

Feb ( N = 427 )

Mar ( N = 495 )

Apr ( N = 465 )

May ( N = 496 )

Jun ( N = 436 )

Jul ( N = 410 )

Aug ( N = 495 )

Sep ( N = 480 )

Oct ( N = 496 )

Nov ( N = 480 )

Dec ( N = 480 )