Jan ( N = 519 )

Feb ( N = 466 )

Mar ( N = 456 )

Apr ( N = 395 )

May ( N = 504 )

Jun ( N = 507 )

Jul ( N = 518 )

Aug ( N = 509 )

Sep ( N = 493 )

Oct ( N = 513 )

Nov ( N = 509 )

Dec ( N = 527 )