11.   But the truth is that such data does not exist.

12.   Furthermore, no reliable data exists on what percentage of prospective tenants use brokers or rely on newspaper ads, bulletin board postings and word of mouth.

13.   However, some useful government data exist, and many advocates point to Louis Harris and Associates polls that have examined the issue.

14.   In places of enduring conflict like Liberia, Sierra Leone, Guinea and southern Senegal, no reliable data exist on elephant populations.

15.   Lawyers for Dow Chemical had argued that scientific data did not exist to support a link between silicone and a variety of serious illnesses.

16.   No comprehensive, authoritative data exist on recidivism among adults.

17.   No data exists on how many jobs have been generated by the explosion in private and public gene efforts.

18.   No data exist to show how many injuries could be prevented if cowboys were required to wear helmets or vests.

19.   Some municipalities issue bonds so rarely and some bonds trade so infrequently that little financial data exist.

20.   They insist that the data do not exist to conclude that androstenedione has the same adverse effects as excessive amounts of testosterone.