The data breaches noted below have been reported because the personal information compromised includes data elements useful to identity thieves, such as Social Security numbers, account numbers, and driver’s license numbers. A few breaches that do NOT expose such sensitive information have been included in order to underscore the variety and frequency of data breaches. However, we have not included the number of records involved in such breaches in the total because we want this compilation to reflect breaches that expose individuals to identity theft as well as breaches that qualify for disclosure under state laws.

More: http://www.privacyrights.org/ar/ChronDataBreaches.htm