Jan ( N = 462 )

Feb ( N = 506 )

Mar ( N = 621 )

Apr ( N = 596 )

May ( N = 593 )

Jun ( N = 578 )

Jul ( N = 620 )

Aug ( N = 600 )

Sep ( N = 578 )

Oct ( N = 546 )

Nov ( N = 565 )

Dec ( N = 448 )