What does this line graph tell us about the demographic changes after world war ii?

There was a baby boom from 1946 to 1964, and then the birth rate basically leveled out.

Explanation:

During World War II, there was elevated birth rate in United States. There was an addition of an average of 4.24 million new babies to the population every year between 1946 and 1964.

The "baby boomers" as it was called, resulted to a strong postwar economy. It gave America the confidence to support larger number of children. There was a great influence it had on the economy that tied marketing demographic for products to their age group. The baby boomers had a strong pull on the American heritage and culture at large. This was around the 1960s during the social movements.