Jan ( N = 462 )

Feb ( N = 417 )

Mar ( N = 535 )

Apr ( N = 458 )

May ( N = 465 )

Jun ( N = 413 )

Jul ( N = 465 )

Aug ( N = 480 )

Sep ( N = 511 )

Oct ( N = 517 )

Nov ( N = 495 )

Dec ( N = 523 )