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It is stated that 10.6% of that group are foreign born and 8.5% are native-born.

Syntactically it doesn't even say that. According to the syntax two subsets of resident 25-34 year olds are compared. Those with advanced degrees and those that are native born.

Among the first group 10.6 % are foreign born. Among the second group 8.5 % are ... what? By parallel construction, foreign born!

In other words, the paragraph is incoherent.

Among all 25- to 34-year-olds living in the United States, 10.6 percent of those with masters, professional or doctoral degrees are foreign born, compared with 8.5 percent of native-born young people....

Actually I think it's saying that they are only counting 8.5% of the native-born young with no parameters set for what constitutes 'young' and no indication that they have any relation to "those with masters, professional or doctoral degrees" or what the comparison is that is alluded to. The closer you look at it the more incoherent it gets.

Then again, dissecting the syntax of a nonsensical statement might in itself be insane. ;-)