Jan ( N = 549 )

Feb ( N = 519 )

Mar ( N = 552 )

Apr ( N = 535 )

May ( N = 550 )

Jun ( N = 534 )

Jul ( N = 552 )

Aug ( N = 556 )

Sep ( N = 535 )

Oct ( N = 499 )

Nov ( N = 531 )

Dec ( N = 551 )