Jan ( N = 266 )

Feb ( N = 200 )

Mar ( N = 417 )

Apr ( N = 457 )

May ( N = 482 )

Jun ( N = 589 )

Jul ( N = 611 )

Aug ( N = 620 )

Sep ( N = 578 )

Oct ( N = 521 )

Nov ( N = 596 )

Dec ( N = 617 )