Jan ( N = 460 )

Feb ( N = 407 )

Mar ( N = 487 )

Apr ( N = 460 )

May ( N = 453 )

Jun ( N = 455 )

Jul ( N = 463 )

Aug ( N = 491 )

Sep ( N = 444 )

Oct ( N = 457 )

Nov ( N = 445 )

Dec ( N = 451 )