According to the 2011 census, 263,346 people answered "Jewish" to the voluntary question on religion, compared with 259,927 in the previous count of 2001. However, this final figure is considered an undercount. Demographers David Graham and Stanley Waterman give several reasons: the underenumeration for censuses in general; the question did not record secular Jews; the voluntary nature of the question; suspicion by Jews of such questions; and the high non-response rate for large numbers of Haredi Jews. By comparison, the Jewish Virtual Library estimated a Jewish population of 291,000 (not limited to adherents of Judaism) in 2012, making Britain's Jewish community the fifth largest in the world. This equates to 0.43% of the population of the United Kingdom.