Jan ( N = 492 )

Feb ( N = 463 )

Mar ( N = 494 )

Apr ( N = 480 )

May ( N = 494 )

Jun ( N = 475 )

Jul ( N = 486 )

Aug ( N = 482 )

Sep ( N = 475 )

Oct ( N = 492 )

Nov ( N = 471 )

Dec ( N = 476 )