18–24 years, picked a score of zero, meaning that they identify as totally heterosexual. Four percent of the total sample, and 6% of young adults, picked a score of six, meaning a totally homosexual identity. Sex researcher Simon LeVay criticized this survey as unreliable because the respondents were not randomly sampled from the entire population. 2009–2016: Integrated Household Survey In all years, it was observed that an LGB identity is most common among London residents and those aged under 35. Homosexual identity in 2016 was more than twice as common among men (1.7%) than among women (0.7%), whereas bisexual identity was more common among women (0.9%) than men (0.6%). 2016 A female-only survey found that 4% of British women identify as gay or bisexual. The United Kingdom Office for National Statistics Annual Population Survey reported over 1 million (2.0%) of the UK population aged 16 and over identified as Lesbian, Gay or Bisexual (LGB). This represented a statistically significant increase from 1.7% in 2015. 2017 In a Survation poll on adults aged 40–70, 92.5% identified as heterosexual, 3.5% as gay, 2.4% as bisexual, 0.5% as Other and 1% did not want to reveal their sexual orientation. Those under 60 were less likely to identify as heterosexual than those aged 60–70. A gay identity was more common among men (6.1%) than women (1%), and the opposite was true of heterosexuality (men: 89.9%, women: 95%). No differences were found in the share identifying as bisexual (2.4% versus 2.5%). London had a higher share of middle aged or older people identifying as gay (8%) or bisexual (6%) than other parts of the country. According to a nationally representative study organized by Kantar TNS, 87% of British men aged 18 to 30 years identify as heterosexual, 7% as homosexual, 5% as bisexual, and 2% as other. An Ipsos MORI survey on behalf of BBC found that British people aged 16–22 (also called Generation Z) have lower odds to identify as exclusively straight (66%) than those who belong to the Millennial generation (71%), Generation X (85%), or Baby boomers (88%). Within Generation Z, there were several important gender differences in sexual identity: young men were more likely to identify as completely heterosexual than young women (73% v. 59%) whereas young women had higher chances to identify as non-exclusively straight (19%) and bisexual (14%) than young men (10% and 5%, respectively). There were no significant gender