Jan ( N = 50 )

Feb ( N = 76 )

Mar ( N = 237 )

Apr ( N = 233 )

May ( N = 239 )

Jun ( N = 181 )

Jul ( N = 197 )

Aug ( N = 199 )

Sep ( N = 225 )

Oct ( N = 232 )

Nov ( N = 150 )

Dec ( N = 233 )