To all this, I just want to add that interpreting such things can be difficult because the words may have somewhat different meanings in different societies, so we may not actually be comparing apples to apples. For example, I would guess that one reason that "democracy" ranks lower in the U.S. is because so many of us have drilled into us that we're a "republic". I'm not sure if that distinction exists in those other countries. Had the question been phrased as "a Republican form of government", the response may have been different.
The bolded language struck me as perhaps one of the core issues we're trying to figure out right now. 17.1% in Egypt is a distinct minority, but it's not an insignificant minority either. I have to ask -- is there a continuum of responses from (for example) "essential" to "important" to "irrelevant" provided in that survey? If so, what are the various responses?
That's really interesting stuff, btw.