Ms. Ertl mentioned earlier that the U.S., in a sense, takes the equivalent of a rental cost for a particular dwelling and substitutes that. Yes, that potentially has some benefits, but it also equally has some things to take into account, because depending upon how much mortgage is left, that may not essentially be an exact or a good enough proxy for some households as it would be for others. All of these methodologies come with a price.
The second thing is the availability of that kind of data. We have to be conscious that you have to have good quality data to be able to put those—