Jan ( N = 557 )

Feb ( N = 521 )

Mar ( N = 557 )

Apr ( N = 506 )

May ( N = 549 )

Jun ( N = 538 )

Jul ( N = 520 )

Aug ( N = 550 )

Sep ( N = 537 )

Oct ( N = 557 )

Nov ( N = 524 )

Dec ( N = 558 )