Jan ( N = 242 )

Feb ( N = 222 )

Mar ( N = 218 )

Apr ( N = 115 )

May ( N = 75 )

Jun ( N = 158 )

Jul ( N = 195 )

Aug ( N = 215 )

Sep ( N = 52 )

May ( N = None )

Jun ( N = 57 )

Jul ( N = 158 )

Aug ( N = 213 )

Sep ( N = 230 )

Oct ( N = 234 )

Nov ( N = 222 )

Dec ( N = 242 )