Jan ( N = 505 )

Feb ( N = 454 )

Mar ( N = 503 )

Apr ( N = 485 )

May ( N = 495 )

Jun ( N = 483 )

Jul ( N = 499 )

Aug ( N = 498 )

Sep ( N = 486 )

Oct ( N = 503 )

Nov ( N = 487 )

Dec ( N = 506 )