Jan ( N = 557 )

Feb ( N = 501 )

Mar ( N = 553 )

Apr ( N = 537 )

May ( N = 555 )

Jun ( N = 532 )

Jul ( N = 555 )

Aug ( N = 550 )

Sep ( N = 511 )

Oct ( N = 430 )

Nov ( N = 500 )

Dec ( N = 466 )