Jan ( N = 530 )
Feb ( N = 479 )
Mar ( N = 528 )
Apr ( N = 489 )
May ( N = 498 )
Jun ( N = 509 )
Jul ( N = 542 )
Aug ( N = 545 )
Sep ( N = 513 )
Oct ( N = 530 )
Nov ( N = 491 )
Dec ( N = 516 )
