Jan ( N = 242 )

Feb ( N = 220 )

Mar ( N = 222 )

Apr ( N = 120 )

May ( N = 110 )

Jun ( N = 177 )

Jul ( N = 207 )

Aug ( N = 220 )

Sep ( N = 53 )

May ( N = None )

Jun ( N = 13 )

Jul ( N = 112 )

Aug ( N = 215 )

Sep ( N = 234 )

Oct ( N = 234 )

Nov ( N = 226 )

Dec ( N = 247 )