Jan ( N = 240 )

Feb ( N = 218 )

Mar ( N = 221 )

Apr ( N = 117 )

May ( N = 89 )

Jun ( N = 177 )

Jul ( N = 207 )

Aug ( N = 220 )

Sep ( N = 53 )

May ( N = None )

Jun ( N = 3 )

Jul ( N = 110 )

Aug ( N = 217 )

Sep ( N = 233 )

Oct ( N = 234 )

Nov ( N = 225 )

Dec ( N = 248 )