Jan ( N = 241 )

Feb ( N = 220 )

Mar ( N = 230 )

Apr ( N = 121 )

May ( N = 75 )

Jun ( N = 160 )

Jul ( N = 201 )

Aug ( N = 215 )

Sep ( N = 55 )

May ( N = None )

Jul ( N = 110 )

Aug ( N = 219 )

Sep ( N = 223 )

Oct ( N = 234 )

Nov ( N = 228 )

Dec ( N = 244 )