Jan ( N = 240 )

Feb ( N = 216 )

Mar ( N = 219 )

Apr ( N = 115 )

May ( N = 67 )

Jun ( N = 173 )

Jul ( N = 205 )

Aug ( N = 220 )

Sep ( N = 57 )

May ( N = None )

Jun ( N = 6 )

Jul ( N = 103 )

Aug ( N = 218 )

Sep ( N = 233 )

Oct ( N = 234 )

Nov ( N = 222 )

Dec ( N = 247 )