[FireFly]

I think it's because the scale reflects just how often it is used for birth control rather than to prevent complications for the mother or baby. If 3% are having abortions, those 3% are likely doing it to save their own lives. If 30% are doing it, it's likely that quite a few are doing it as a form of birth control. Even if only 10% are doing it for birth control, and 20% are doing it out of complications, 10% of women using abortion as birth control is a pretty high stat.