Jan ( N = 494 )

Feb ( N = 448 )

Mar ( N = 495 )

Apr ( N = 473 )

May ( N = 476 )

Jun ( N = 478 )

Jul ( N = 470 )

Aug ( N = 492 )

Sep ( N = 475 )

Oct ( N = 496 )

Nov ( N = 469 )

Dec ( N = 493 )