Regarding the actual article, I have nothing to add that hasn't been discussed already (and at this point I bet nobody will see this comment anyway). However, the specific grammar error in the title annoys me to no end, so I wanted to vent.
...one in 10 residents are...
It should be "...one in 10 residents is..."
People seem to forget how to conjugate after three words. Similarly, all too often I read something like, "None of these things are..." I don't have an English degree, but in my mind parsing that phrase is like nails on a chalkboard.
For the 0 of you still reading, a tip: You can omit certain parts of the sentence - and expand others - to test how the subject-verb pair sounds.
"None of these things are..." -> "Not one of these things are..." -> "Not one are..." Wtf??
Anyway, thanks for listening to my Ted Talk Ralph Rant.