Jan ( N = 496 )

Feb ( N = 458 )

Mar ( N = 493 )

Apr ( N = 480 )

May ( N = 494 )

Jun ( N = 471 )

Jul ( N = 493 )

Aug ( N = 496 )

Sep ( N = 480 )

Oct ( N = 494 )

Nov ( N = 448 )

Dec ( N = 448 )