Jan ( N = 89 )

Feb ( N = 75 )

Mar ( N = 237 )

Apr ( N = 232 )

May ( N = 234 )

Jun ( N = 178 )

Jul ( N = 195 )

Aug ( N = 197 )

Sep ( N = 224 )

Oct ( N = 232 )

Nov ( N = 159 )

Dec ( N = 247 )