Look at the visualization titled "Changing Face of America" (the second visualization on the page). This is a new kind of visualization in which the total for each year is scaled to $100 %$, and the colors are shaded according to the percentage of the population comprised of each racial/ethnic group.

(a) Which racial/ethnic group is decreasing the most in terms of percentage of the US population?

(b) Which racial/ethnic group is increasing the most in terms of percentage of the US population?

(c) Which racial/ethnic group is staying the most constant in terms of percentage of the US population?

The website http://www.pewresearch.org/next-america/#Two-Dramas-in-Slow-Motion shows two data visualizations of the the US population changing from 1950 or 1960 to 2060 (projected). The first visualization is broken down by both sex and age, and the second visualization is broken down by race and ethnicity.