Ignorance Test

http://www.cnn.com/2013/12/10/world/gapminder-us-ignorance-survey/

I scored a disappointing 4/10.

Quote :

Rosling said that for him the most surprising lack of knowledge demonstrated in the quiz was on the measles vaccination. Just 17% of the U.S. respondents chose the correct answer -- 80% of the world's children are vaccinated by their first birthday. Forty-four per cent wrongly guessed a fifth of children and 39% said half.
"That to me was absolutely astonishing because it is the most solid and stable success of the world. Now we vaccinate 4 out of 5 children," said Rosling.
"It's a beautiful example of global collaboration, life saving technology, the flagship of aid, awareness among governments and parents in even the poorest countries -- and it's not known."

He seems to have overlooked the willful ignorance movement in the US.

That's one I missed. I guessed half.