As I said in my statement I don't think there's a perfect mix in the number of countries. The real importance is predictability and consistency. Canada changing every four years which countries it's working in is not helpful to the international community. You all know this very well, but as a government you need to know where your revenue is coming from, especially if it's aid; you need to plan budgets. It's much more helpful if you can plan for five years rather than not knowing if you're suddenly going be dropped because a new government has been elected in Canada.
My emphasis would be on sticking with the existing list of countries of focus. But I think also, as Jim has suggested, if Canada wants to have an impact, then it's going to have to increase the amount of money it dedicates to those countries of focus.