Jan ( N = 240 )

Feb ( N = 221 )

Mar ( N = 215 )

Apr ( N = 115 )

May ( N = 69 )

Jun ( N = 156 )

Jul ( N = 196 )

Aug ( N = 215 )

Sep ( N = 55 )

May ( N = None )

Jun ( N = 58 )

Jul ( N = 169 )

Aug ( N = 208 )

Sep ( N = 229 )

Oct ( N = 234 )

Nov ( N = 222 )

Dec ( N = 241 )