Jan ( N = 284 )

Feb ( N = 135 )

Mar ( N = 397 )

Apr ( N = 512 )

May ( N = 531 )

Jun ( N = 489 )

Jul ( N = 545 )

Aug ( N = 531 )

Sep ( N = 525 )

Oct ( N = 509 )

Nov ( N = 464 )

Dec ( N = 516 )