What does the blue block on the chart mean?
The blue block in the chart represents U.S. population growth since 1970 — more than 90 million! This information comes from the U.S. Bureau of the Census. To find similar population growth in foreign countries, we must look to the Third World. Although its frontiers were declared closed a century ago, the United States today is adding population at a numerical level just under the phenomenal Baby Boom, which far exceeded all other periods of U.S. population growth.
