As I mentioned, the CJC just adopted a policy for mandatory attendance by newly appointed judges, and we are discussing what else may need to be mandatory. I don't know how easy it would be to get the numbers, but I think most judges take very seriously that ethical obligation. They do participate in programs, and as Justice Kent mentioned, more senior judges will take more specialized courses so that they can manage complex commercial and criminal matters, and assist the court in getting its more difficult work done.
On April 11th, 2017. See this statement in context.