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 )
