Jan ( N = 539 )

Feb ( N = 486 )

Mar ( N = 483 )

Apr ( N = 430 )

May ( N = 540 )

Jun ( N = 536 )

Jul ( N = 553 )

Aug ( N = 554 )

Sep ( N = 533 )

Oct ( N = 553 )

Nov ( N = 535 )

Dec ( N = 544 )