I'm not entirely sure, to be honest with you. The thing to take into account in the Canadian context, however, is that most of this is not federally owned infrastructure, and I think that makes us fairly unique. Much of it is owned by the provinces, territories, and municipalities. When you're doing international comparisons, that fact adds an extra complexity to ensuring that we have appropriate data.
On May 5th, 2015. See this statement in context.