What the human is putting in as we get better and better technology goes down substantially, 216,000 and 33,000, and we will se that with the tractor that goes down even more, but the total energy, if you include the amount of energy that the oxen have to put in, or if you include the amount of energy to do the gasoline that has to be used for the tractor, the total amount of energy is going up to plough that field, but the human energy goes down dramatically. 