Anecdotal data based on a lifetime in the computer industry. I doubt you'd find many that disagree with me though.
Most everyone I know that has a "home" copy of Office got it at work and use it at home either illegally or based on some thin justification of "working at home." I work at a large institution at the moment where everyone is on the same bulk license and we negotiate each year with Microsoft for same. They have been pushing us onto a subscription model (or trying to) for the last three years and most of the guys responsible for the actual contract are agreeable to this as it saves the yearly negotiation.