Jan ( N = 240 )

Feb ( N = 218 )

Mar ( N = 211 )

Apr ( N = 117 )

May ( N = 72 )

Jun ( N = 171 )

Jul ( N = 204 )

Aug ( N = 220 )

Sep ( N = 56 )

May ( N = None )

Jun ( N = 8 )

Jul ( N = 103 )

Aug ( N = 216 )

Sep ( N = 233 )

Oct ( N = 233 )

Nov ( N = 222 )

Dec ( N = 247 )