Madam Chair, thank you. It's a very good question.
I'm not sure that I have a precise answer, but the Farm Products Council of Canada, for example, which runs the supply management system for many of the products under supply management, celebrated its 50th anniversary last year, so it dates back to the early 1970s. It was in the 1960s and 1970s—in that era—that the system came in as the forerunner of its current form, but I'm afraid I can't offer a more precise date.