Yes. I don't have the exact figures with me, but I would refer you, Ms. James, to the comprehensive evaluation of the federal skilled worker program done by my department two years ago, which is on the CIC website. It indicates a very strong correlation of language proficiency and youth with economic outcomes for workers.
In fact, all of the research—not just that done by my department, but that done by independent academics—comes to the same conclusion, which is that official language proficiency, and frankly and more specifically, English-language proficiency, is the single largest factor in economic success for immigrants. This is not to say it's the only factor and not to say that people with limited language proficiency can't and don't succeed on occasion. But statistically, it's the single greatest indicator, as is the relative youth of newcomers.