21.   Previous estimates of immunization rates were based on data from the National Health Interview Survey, an ongoing general health study based on household interviews.

22.   The age range determined for each document matched previous estimates from a technique called paleography, which is based on changes in handwriting styles over time.

23.   The company was already looking to downgrade this estimate, as refining margins have fallen short of previous estimates because of excess refinery capacity in the region.

24.   The company said second quarter Ebitda and revenue will be less than previous estimates.

25.   The figures were roughly in line with previous estimates, and included both direct and indirect costs as well as interest payments that will stretch out for decades.

26.   The figure is nearly three times previous estimates.

27.   The larger-than-expected number is expected to bring down previous estimates of economic growth in the second quarter.

28.   The numbers were lower than many previous estimates.

29.   The numbers, which more than doubled previous estimates of Internet users, were quickly embraced by companies hoping to strike it rich in electronic commerce.

30.   The potential duration of the trial was not discussed Monday, but previous estimates made by attorneys in the case have ranged from a month to six weeks.