As a separate point from the countries not shown, you can't just average the dates - if I'm using half an earth's worth of resources every day, and you're using half an earth's worth of resources every year, between us we use an earth's worth of resources much more often than once every 6 months. You need to take reciprocals to get consumption rates, then average, then convert back into a date. This results in an earlier date than just doing the weighted average of dates.