Jan ( N = 493 )

Feb ( N = 448 )

Mar ( N = 495 )

Apr ( N = 470 )

May ( N = 477 )

Jun ( N = 479 )

Jul ( N = 483 )

Aug ( N = 495 )

Sep ( N = 479 )

Oct ( N = 496 )

Nov ( N = 469 )

Dec ( N = 496 )