Jan ( N = 395 )

Feb ( N = 454 )

Mar ( N = 470 )

Apr ( N = 487 )

May ( N = 502 )

Jun ( N = 485 )

Jul ( N = 501 )

Aug ( N = 502 )

Sep ( N = 406 )

Oct ( N = 501 )

Nov ( N = 485 )

Dec ( N = 504 )