Jan ( N = 525 )

Feb ( N = 468 )

Mar ( N = 459 )

Apr ( N = 401 )

May ( N = 506 )

Jun ( N = 509 )

Jul ( N = 523 )

Aug ( N = 510 )

Sep ( N = 505 )

Oct ( N = 519 )

Nov ( N = 501 )

Dec ( N = 533 )