Jan ( N = 400 )

Feb ( N = 384 )

Mar ( N = 427 )

Apr ( N = 413 )

May ( N = 433 )

Jun ( N = 419 )

Jul ( N = 434 )

Aug ( N = 427 )

Sep ( N = 420 )

Oct ( N = 434 )

Nov ( N = 379 )

Dec ( N = 416 )