Jan ( N = 243 )

Feb ( N = 222 )

Mar ( N = 236 )

Apr ( N = 122 )

May ( N = 88 )

Jun ( N = 175 )

Jul ( N = 201 )

Aug ( N = 216 )

Sep ( N = 51 )

May ( N = None )

Jun ( N = 1 )

Jul ( N = 120 )

Aug ( N = 219 )

Sep ( N = 225 )

Oct ( N = 234 )

Nov ( N = 229 )

Dec ( N = 244 )