This isn’t anything “required” by any standard, but… if you look in an almanac, or around a few government websites, you can find a listing of the Gross Domestic Product of many, many nations.
Wouldn’t it be cool if there was something like that for GW2? This is one of those hidden variables, and I’ve always wondered if Anet is monitoring how much gold is in the economy, and how much gold the average player has. If they are, wouldn’t it be cool to know that stuff?
