Jan ( N = 245 )

Feb ( N = 221 )

Mar ( N = 232 )

Apr ( N = 123 )

May ( N = 87 )

Jun ( N = 165 )

Jul ( N = 201 )

Aug ( N = 215 )

Sep ( N = 51 )

May ( N = None )

Jun ( N = 11 )

Jul ( N = 123 )

Aug ( N = 218 )

Sep ( N = 228 )

Oct ( N = 235 )

Nov ( N = 228 )

Dec ( N = 245 )