The numbers should be rounded to the nearest percent--in a survey, you'll never get the precision to say anything like "45.2%"--but otherwise it's a clean display. Follow the link above for context and further discussion.
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Andrew,
Love your stuff at 538, love your stuff here - am I a fool for not knowing which link to follow for more discussion? E-mail works - it should attach it to my comment...
Best/thanks,
-Dave
the link is above the graph: http://freakonomics.blogs.nytimes.com/2010/01/13/is-costa-rica-even-the…
Is generally don't like stacked barcharts. And this seems to need a sorting? e.g. descinding percentage of "very happy"?
Cheers.