Feb ( N = 8 )

Mar ( N = 1 )

Jan ( N = 197 )

Feb ( N = 173 )

Mar ( N = 258 )

Apr ( N = 175 )

May ( N = 175 )

Jun ( N = 71 )

Jul ( N = 2 )

Apr ( N = None )

Jul ( N = 115 )

Aug ( N = 190 )

Sep ( N = 146 )

Oct ( N = 17 )

Nov ( N = 143 )

Dec ( N = 132 )