st: twoway line with mean and quartiles

[Morten Støver <morten.stover@ntnu.no>]

Hi. I'm new to both Stata and Statalist. My first question probably 
quite simple. I have a dataset with follow-up time from 1990 to 2007 for 
various municipalities. I want a graph that shows me mean level of 
unemployment for ALL the municipalities for each year through the follow 
up period, and I also want the lower and upper quartiles to be shown. It 
guess should be something like  twoway (line unemployment year)  but how 
to get only three lines with mean and quartiles?
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