I can't say for sure for propane, but I think most would have a large tank by their dryer, or they'd have a large tank beside their chicken barn or hog barn. Some don't even have a home on the farm, let's just say, but they would have a smaller tank at your house. That is pretty obvious.
The natural gas is pretty close, too, but your accountant would be able to calculate the square footage of your home, if it were all on the same metre, within a few bucks. It's going to be pretty small, compared with the cost of heating a hog barn, so we're talking a couple of hundred bucks on a $50,000 bill.