As jacalata described, the actual income differences in dollars are not distributed linearly across the y axis. Each percentile interval represents a different dollar interval.
The y axis uses percentages, too. But it displays an absolute number of people, so the number of people in the 10-20% bracket equals those in the 80-90% bracket and so on.
The actual number of children won't be the same for each income bracket, but the are evenly distributed on the y axis. I think :)
The y axis uses percentages, too. But it displays an absolute number of people, so the number of people in the 10-20% bracket equals those in the 80-90% bracket and so on.
The actual number of children won't be the same for each income bracket, but the are evenly distributed on the y axis. I think :)