My apologies that I don't know the number, so I can't give you hard data on this.
My sense is that at least when it comes to academia, I think what Dr. LaMontagne was mentioning earlier was that there are more lecturer positions instead of tenure-track positions doing research. Obviously, if there are fewer research tenure-track positions, more of our graduates or Ph.D.s are going abroad or having to find work outside their preferred field or outside their preferred area.
If we want to talk more generally about the brain drain—not just researchers and professors, but more generally—again I don't have the data. The World Intellectual Property Organization, or WIPO, looks at inventers around the world—people who have invented patents. They look at what country they're from and where they are living. Canada had the biggest number of Canadians living abroad who had patented, second only to China and India. Given that China and India have a billion people plus, it is quite shocking. Imagine how many people we're losing who could be contributing to innovation.