I've been asking fellowship candidates the following question:
"There are approximately 300 million people in the United States. About how many babies are born each year?"
Answers so far have ranged from 20,000 to 100 million!
Absolutely no one knows the answer, which is available in this article or as the first commnent to this post.
Try to make an educated guess, then look to see the actual number.
Hint: it is somewhere between 20,000 and 100 million.