In March 2006, the National Association of State Work Force Agencies (NASWA) posted a file containing the full names, social security numbers, and dates of birth of 1,446 individuals who apparently participated in a program offered by the agencies. The organization was notified in March, 2006, and the file was taken offline. However, the file remained in online caches until at least October, 2008.
You can confirm whether you were affected by this breach by searching for your name at www.ssnbreach.org.
Source: www.ssnbreach.org.