I was looking for some data on percentage of Engineering graduates by country (have not found that yet) but discovered a couple of interesting articles/papers.
It would be interesting to correlate various engineering questions on CR4, by country or school someday.
For your reading pleasure...lots of graphs and numbers in the Engineering Statistics paper.
http://www.theatlantic.com/education/archive/2014/03/the-myth-of-the-science-and-engineering-shortage/284359/
http://www.imeche.org/news/engineering/top-ten-best-cities-in-the-world-to-be-an-engineer