Jan ( N = 256 )

Feb ( N = 468 )

Mar ( N = 679 )

Apr ( N = 510 )

May ( N = 570 )

Jun ( N = 641 )

Jul ( N = 512 )

Aug ( N = 620 )

Sep ( N = 579 )

Oct ( N = 625 )

Nov ( N = 582 )

Dec ( N = 642 )