So how would we think about this? There's 17 people in this group, how many people are in this group? Well, they tell us that 17 is 34% of the row, of the row total, so I guess you could say 17 is 34.3% of the moderate, of the moderate computer users. Or you could say that 17 is 30% of the people who slept five to seven hours each night. Or you could say 17 is 10%, is 10% of the total, of the total number of people. So let's just go with that. We could figure out the total number of people.