Jan ( N = 530 )

Feb ( N = 479 )

Mar ( N = 528 )

Apr ( N = 489 )

May ( N = 498 )

Jun ( N = 509 )

Jul ( N = 542 )

Aug ( N = 545 )

Sep ( N = 513 )

Oct ( N = 530 )

Nov ( N = 491 )

Dec ( N = 516 )