[WhistlingPastTheGraveyard]

I know you aren't going to like me pointing this out, but you could also interpret that to say that 77% of the population supports legalized abortion

Of the three choices, which one would those repondents who favor abortion only in cases of rape, incest and life of the mother fall in to?

[JeffAtlanta]

Of the three choices, which one would those repondents who favor abortion only in cases of rape, incest and life of the mother fall in to?

Mostly "Should not be permitted". Those you listed are called "extreme circumstances", not merely "stricter limits". Stricter limits means parental notification, partial birth and third trimester abortions.

Think of it this way. If you substituted "alcohol consumption" for "abortion", what do you think "stricter limits" would mean? It wouldn't mean "extreme circumstances" - it would mean things like higher age limits.

Even people that would chose "alcohol consumption should not be permitted" would reasonably concede that it could be used for life saving medical procedures.