Jan ( N = 497 )

Feb ( N = 438 )

Mar ( N = 408 )

Apr ( N = 400 )

May ( N = 518 )

Jun ( N = 500 )

Jul ( N = 538 )

Aug ( N = 408 )

Sep ( N = 477 )

Oct ( N = 491 )

Nov ( N = 392 )

Dec ( N = 120 )