Jan ( N = 522 )

Feb ( N = 482 )

Mar ( N = 524 )

Apr ( N = 518 )

May ( N = 532 )

Jun ( N = 510 )

Jul ( N = 519 )

Aug ( N = 529 )

Sep ( N = 510 )

Oct ( N = 289 )

Nov ( N = 540 )

Dec ( N = 558 )