1.   Although experts cannot agree on what fraction of baby boomers is headed for trouble, the best estimates range from one- to two-thirds.

2.   But other elements, such as the early case conferences, could be expensive, and estimates have ranged wildly within the administration.

3.   Cleanup estimates range from tens to hundreds of billions of dollars for the United States alone.

4.   Crowd estimates ranged improbably from a couple of hundred thousand to nearly a million.

5.   Estimates range into the millions of dollars.

6.   Estimates range from dozens to a few hundred, but no one knows for sure.

7.   Exact world population figures are unknown, but estimates range between one and two million.

8.   No one knows how many foreign women are being trafficked into sexual bondage in the European Union every year, but estimates range well into the thousands.

9.   No one knows how many rebel soldiers there are, though estimates range in the thousands.

10.   On past shows, estimates have ranged from a few hundred dollars to hundreds of thousands.