Jan ( N = 112 )

Feb ( N = 50 )

Mar ( N = 49 )

Apr ( N = 98 )

May ( N = 121 )

Jun ( N = 20 )

Apr ( N = None )

Jul ( N = 51 )

Aug ( N = 149 )

Sep ( N = 124 )

Oct ( N = 8 )

Nov ( N = 126 )

Dec ( N = 104 )