Jan ( N = 221 )

Feb ( N = 222 )

Mar ( N = 234 )

Apr ( N = 232 )

May ( N = 242 )

Jun ( N = 230 )

Jul ( N = 242 )

Aug ( N = 242 )

Sep ( N = 128 )

Jan ( N = 172 )

Feb ( N = 204 )

Mar ( N = 237 )

Apr ( N = 237 )

May ( N = 242 )

Jun ( N = 236 )

Jul ( N = 228 )

Aug ( N = 229 )

Sep ( N = 234 )

Oct ( N = 240 )

Nov ( N = 240 )

Dec ( N = 236 )

Sep ( N = None )

Oct ( N = 108 )

Nov ( N = 218 )

Dec ( N = 165 )