Jan ( N = 31 )

Feb ( N = 29 )

Mar ( N = 32 )

Apr ( N = 33 )

May ( N = 21 )

Jun ( N = 247 )

Jul ( N = 494 )

Aug ( N = 496 )

Sep ( N = 479 )

Oct ( N = 489 )

Nov ( N = 475 )

Dec ( N = 215 )