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Hackers And Caffeine
A while back I posted a poll on a popular site for Hackers, HackerNews. The question? How much caffeine do you consume each day?
Broken down by age and cups, here are the results:

UPDATE: Added 2-D graph by request

UPDATE-2: Added graph for highest usage

UPDATE-3: Added 2-D zero caffeine usage graph by request

UPDATE-4: Added the data grid

The data used in the charts
Interesting, but your technique leaves a bit to be desired. The poll you mention suffers from a self-selection bias and using only the Hacker News site also biases your results. Use these numbers for anything important at your peril.
@Toby, I don't agree - the 'research question' (to use that concept loosely) is to determine the amount of caffeine used *by the visitors of HN* - i.e., nowhere do I see stated that this poll was supposed to be representative of the population at large. Obviously the self-selection inherent in any poll remains.
Hello, great and necessary poll - how about a download link for a super poster?
;-)