Jan ( N = 454 )

Feb ( N = 471 )

Mar ( N = 526 )

Apr ( N = 510 )

May ( N = 527 )

Jun ( N = 510 )

Jul ( N = 476 )

Aug ( N = 426 )

Sep ( N = 346 )

Oct ( N = 419 )

Nov ( N = 327 )

Dec ( N = 421 )