The 2001 Census included a (voluntary) religion question ("What is your religion?") for the first time in its history; 266,740 people listed their religion as "Jewish". However, the subject of who is a Jew is complex, and the religion question did not record people who may be Jewish through other means, such as ethnically and culturally. Of people who chose Jewish as their religion, 97% put White as their ethnic group; however, a report by the Institute for Jewish Policy Research (JPR) suggests that, although there was an apparent option to write down "Jewish" for this question, it did not occur to many, because of "skin colour" and nationality bias; and that if "Jewish" was an explicit option, the results—only 2594 respondents were Jewish solely by ethnicity—would have been different. The religion question appeared in the 2011 Census, but there was still no explicit option for "Jewish" in the ethnic-group question. The Board of Deputies had encouraged all Jews to indicate they were Jewish, either through the religion question or the ethnicity one.