Jan ( N = 239 )

Feb ( N = 217 )

Mar ( N = 210 )

Apr ( N = 115 )

May ( N = 66 )

Jun ( N = 170 )

Jul ( N = 201 )

Aug ( N = 220 )

Sep ( N = 57 )

May ( N = None )

Jul ( N = 106 )

Aug ( N = 215 )

Sep ( N = 232 )

Oct ( N = 234 )

Nov ( N = 222 )

Dec ( N = 248 )