Jan ( N = 243 )

Feb ( N = 220 )

Mar ( N = 230 )

Apr ( N = 126 )

May ( N = 86 )

Jun ( N = 172 )

Jul ( N = 200 )

Aug ( N = 215 )

Sep ( N = 51 )

May ( N = None )

Jun ( N = 14 )

Jul ( N = 121 )

Aug ( N = 218 )

Sep ( N = 230 )

Oct ( N = 235 )

Nov ( N = 228 )

Dec ( N = 246 )