Jan ( N = 496 )

Feb ( N = 448 )

Mar ( N = 495 )

Apr ( N = 471 )

May ( N = 477 )

Jun ( N = 480 )

Jul ( N = 484 )

Aug ( N = 463 )

Sep ( N = 476 )

Oct ( N = 495 )

Nov ( N = 470 )

Dec ( N = 496 )