Collection of data does become a bit problematic in terms of company confidential information. There are ways of doing it. As I mentioned, the EIA in the United States does a fair amount, and industry complains. I was involved with the ground-source heat-pump industry down there, and they bitched about having to fill out the forms, how many units they were shipping. If kept company confidential, then you have a lot of very good data.
How it's collected, I'd prefer to leave to your legal experts in terms of how to do that. It's a burden, and people will complain that government is interfering again. My focus is more on the dissemination, distribution, publication, and release of this data.
I like the material that comes from the office of energy efficiency. Statistics Canada, in my opinion, is probably the weakest source, because it misses a lot of stuff. I prefer the office of energy efficiency. It has a very large amount of data in downloadable files. I can segment it by which years I want. I can compare year to year. You have to be an expert in Excel to take full advantage, and that's where the geeks will rise to the surface, so to speak.
I would also love to see summary data that is made intelligible for average people, so that they have some idea.... Again, my criticism of the one-tonne challenge was, “Huh? What is a tonne?”