How much actual AC current does the 85W MacbookPro charger draw at 220V?

Hi. I need to know the actual current drawn by the 85watt MacBook Pro AC charger from 220V 60Hz.
I am designing rooms and libraries that will typically have 10 to 30 Macbook Pro's in use. I need to design the power outlets they will use.
I know the actual value will vary with load (The MacBook's use situation).
I know the actual value will vary depending on the battery charge state when the Macbook is plugged in.
I know the maximum value would be at 85 watts OUTPUT from the charger, and that the charger is not 100% efficient, but is probably 85-90 percent efficient. Maybe.
At the moment I'm in a hotel in the Middle East with no test equipment..
So: Has anybody measured the AC current on a Macbook at 220V, like in Europe, Australia, Middle East, China?? Ideally I'd like it with a discharged battery, and maybe with a fully charged battery and just a browser running. (For the extremes??)
Any data, sugggestions, (Contacts at Apple???) would be appreciated..
Thanks!
[email protected] ...On the Red Sea in Jeddah

Thanks, people, for the help and information..
My working number until I can actually do measurements, will be approximately:
- Phil's number: 85/220 = 0.386 / .90 = .43 Amps
This is based on a estimate of the charger's efficiency being 90%. Based on the temperature rise of the charger case, my rough estimate of the power dissipated there is 5 to 10 watts. Very roughly. So it's probably close...
So, back to my original need and question:
How many 15 inch MacBook Pros that are actively recharging batteries while being used for web surfing can I run on a 220Volt 16Amp circuit??
Answer: About 32. We may well have 25 from time to time, probably never 32. So I'm cool.. for now..
And I'm betting, based on other experience, that 25 kids won't plug their charger in during the same 2 or 3 AC cycles, so the surge current will be OK also.
But don't do this: Put out a string of multi-outlet strips, connect all the computers, and THEN flip the single power switch. That surge probably WILL trip the circuit breaker.
Whoever gets a decent AC ammeter on one of these chargers first, please post results here.
Thanks from the Middle East.
[email protected]

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