The census and the police use a system of "self defined ethnicity", and other official forms use similar categories: http://en.wikipedia.org/wiki/Self_Defined_E

The census and the police use a system of "self defined ethnicity", and other official forms use similar categories: http://en.wikipedia.org/wiki/Self_Defined_Ethnicity http://en.wikipedia.org/wiki/Self_Defined_Ethnicity