Sixteen officials faced disciplinary proceedings for Police and Border Guard Board's (PPA) KAIRI information system. Four lost to their jobs for unauthorized access.
For example, one police officer from Jõhvi made 170 queries on 70 individuals, 52 vehicles and 11 phone numbers, none related to his official duties.
"PPA takes data handling very seriously and exercises ever stronger control over the use of its information systems," said Anne Abel from PPA's internal audit office.
Tighter regulations were put in place after the high-profile case of Alice Järvet, a former head of the analysis and planning bureau, found guilty of leaking information from a police database in 2013.
President Ilves pardoned Järvet in April.
Editor: M. Oll