Jan ( N = 557 )

Feb ( N = 518 )

Mar ( N = 551 )

Apr ( N = 530 )

May ( N = 552 )

Jun ( N = 530 )

Jul ( N = 547 )

Aug ( N = 553 )

Sep ( N = 531 )

Oct ( N = 497 )

Nov ( N = 528 )

Dec ( N = 547 )