Jan ( N = 528 )

Feb ( N = 479 )

Mar ( N = 525 )

Apr ( N = 488 )

May ( N = 498 )

Jun ( N = 511 )

Jul ( N = 541 )

Aug ( N = 542 )

Sep ( N = 513 )

Oct ( N = 530 )

Nov ( N = 490 )

Dec ( N = 517 )