Iran lacks data on the numbers of ethnic minorities

U.N. Urges Iran To Tackle Racism:

the Committee on the Elimination of Racial Discrimination (CERD), a group of 18 independent rights experts, said Iran lacked data on the numbers of ethnic minorities despite a census in 2007...

http://www.unpo.org/article/11582

COMMITTEE ON ELIMINATION OF RACIAL DISCRIMINATION CONSIDERS REPORT OF IRAN:

it was hard to evaluate these efforts because there was no data by ethnicity or race. This lack of data also made it difficult to identify and tackle discrimination and take concrete steps to combat it.

http://www.unog.ch/80256EDD006B9C2E/%28httpNewsByYear_en%29/B13800BE88511F94C125777600483BEC?OpenDocument