Question

What percentage of voters are young voters? 18-25 of age?

Answer 1

http://www.google.com/search?q=registered+voters+usa+by+age+group&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

Read through these -- I'm sure it depends on what election year you're referring to.