Jan ( N = 401 )

Feb ( N = 377 )

Mar ( N = 403 )

Apr ( N = 390 )

May ( N = 403 )

Jun ( N = 390 )

Jul ( N = 401 )

Aug ( N = 403 )

Sep ( N = 390 )

Oct ( N = 402 )

Nov ( N = 390 )

Dec ( N = 403 )