Jan ( N = 248 )

Feb ( N = 221 )

Mar ( N = 237 )

Apr ( N = 120 )

May ( N = 103 )

Jun ( N = 173 )

Jul ( N = 203 )

Aug ( N = 216 )

Sep ( N = 51 )

May ( N = None )

Jun ( N = 18 )

Jul ( N = 136 )

Aug ( N = 218 )

Sep ( N = 231 )

Oct ( N = 235 )

Nov ( N = 229 )

Dec ( N = 246 )