Jan ( N = 84 )

Feb ( N = 56 )

Mar ( N = 114 )

Apr ( N = 121 )

May ( N = 75 )

Jun ( N = 141 )

Jul ( N = 185 )

Aug ( N = 195 )

Sep ( N = 50 )

May ( N = None )

Jun ( N = 2 )

Jul ( N = 106 )

Aug ( N = 219 )

Sep ( N = 231 )

Oct ( N = 229 )

Nov ( N = 117 )

Dec ( N = 137 )