Definitions and naming conventions for the category have evolved in the history of UK censuses. The 1991 United Kingdom census was the first to include a question on ethnicity (apart from in Northern Ireland, where the question was not asked until 2001). The question had tick-boxes for "Indian", "Pakistani" and "Bangladeshi". There was also a tick box, as well as a general "Any other ethnic group (please describe)" option for those not wishing to identify with any of the pre-set tick boxes. For the 2001 census, in England and Wales, "Indian", "Pakistani" and "Bangladeshi" and "Any other Asian background (please write in)" options were grouped under an "Asian or Asian British" heading, with appearing under a separate heading. In Scotland, all of these tick-boxes were grouped together under an "Asian, Asian Scottish or Asian British" heading, and in Northern Ireland no broad headings were used, just tick-boxes for each of the Asian groups.