Jan ( N = 24 )

Feb ( N = 26 )

Mar ( N = 31 )

Apr ( N = 29 )

May ( N = 31 )

Jun ( N = 21 )

Jul ( N = 27 )

Aug ( N = 77 )

Sep ( N = 371 )

Oct ( N = 358 )

Nov ( N = 362 )

Dec ( N = 367 )