Jan ( N = 522 )
Feb ( N = 420 )
Mar ( N = 457 )
Apr ( N = 508 )
May ( N = 478 )
Jun ( N = 277 )
Jan ( N = 525 )
Feb ( N = 491 )
Mar ( N = 523 )
Apr ( N = 509 )
May ( N = 527 )
Jun ( N = 510 )
Jul ( N = 523 )
Aug ( N = 523 )
Sep ( N = 508 )
Oct ( N = 527 )
Nov ( N = 509 )
Dec ( N = 534 )
Jan ( N = None )
Feb ( N = None )
Mar ( N = None )
Apr ( N = 221 )
May ( N = 499 )
Jun ( N = 511 )
Jul ( N = 513 )
Aug ( N = 511 )
Sep ( N = 504 )
Oct ( N = 530 )
Nov ( N = 494 )
Dec ( N = 527 )
