Causes of U.S. population growth in the 1990s

The vigorous development of high-tech industries.

The population growth in the United States in the 1990s was due to the rapid development of high-tech industries.

The population of the United States doubled from 1950 to 2006, adding 150 million people. In the first six years of the 21st century, the U.S. population increased by 20 million, 60% of which was domestic natural growth and 40% of which was immigration.