A dash means the survey found no household without a subscription in that place. That describes the sample, not the place, so no rate is published for it.
Limited data
Real places whose estimates are too small or too uncertain to quote as a rate. Each page says which.
Census places in Pennsylvania starting with H whose estimates are too limited to report as a rate
A dash means the survey found no household without a subscription in that place. That describes the sample, not the place, so no rate is published for it.