Jan ( N = 529 )

Feb ( N = 474 )

Mar ( N = 523 )

Apr ( N = 511 )

May ( N = 524 )

Jun ( N = 511 )

Jul ( N = 521 )

Aug ( N = 521 )

Sep ( N = 506 )

Oct ( N = 285 )

Nov ( N = 540 )

Dec ( N = 558 )