I'm 25. I made about 70k this year. How do I find out average salaries of people my age? In my occupation?

I'm a EE. 70k is including my bonus, but not including the perks like health care and dental and 401k matching. But the average starting salaries listed by school don't really help me much - I'm 3 years out of college and curious if statistics are tracked for this stuff by age, not by occupation (EEs average salary doesn't do much for me).. Anyone have a good resource for this kind of information?
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That's hard because salaries vary from place to place. For example a job in Dallas TX that pays $15 pays $32 an hour in Virginia. Of course homes cost more in Virginia. I think that would be an impossible to really find out. I mean $35k in Dallas = $70k in Virginia = $25k in Wyoming.
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