Jan ( N = 557 )

Feb ( N = 509 )

Mar ( N = 544 )

Apr ( N = 499 )

May ( N = 588 )

Jun ( N = 406 )

Jul ( N = 185 )

Aug ( N = 594 )

Sep ( N = 225 )

Jan ( N = 577 )

Feb ( N = 517 )

Mar ( N = 564 )

Apr ( N = 496 )

May ( N = 540 )

Jun ( N = 527 )

Jul ( N = 535 )

Aug ( N = 522 )

Sep ( N = 505 )

Oct ( N = 534 )

Nov ( N = 577 )

Dec ( N = 455 )

May ( N = None )

Jun ( N = None )

Jul ( N = 503 )

Aug ( N = 557 )

Sep ( N = 477 )

Oct ( N = 559 )

Nov ( N = 458 )

Dec ( N = 569 )