The charts above are from the Pew Research Center. It is from a survey they did between October 18th and 21st of 9,676 adults, with a 1.6 point margin of error.
It shows that 44% of childless adults say they are not likely to have any children, and 74% of parents say they are not likely to have more children.
This is a problem for the anti-immigration Republicans. If immigration is cut off and U.S. adults have less children, where will our future work force come from?
We already need more immigrants, and in the future that need will only increase.