Not sure where the less than 1% figure orginates. These are the recent stats-
Scientific studies have reported the percentage of those whose
sexual attraction is only towards the same sex are range from 4% to 7.5% for women and 7.7% to 13.95% for men with the averages being 9.37% for men and 4.87% for women.
The Indiana University Kinsey Reports (Sexual Behavior in the Human Male - Kinsey, Pomeroy, and Martin/Sexual Behavior in the Human Female - Kinsey, Pomeroy, Martin, and Gerhard) reported 10% of males being more or less exclusively homosexual and 2% to 6% of females being more or less exclusively homosexual.
A 1990 study (Homosexuality/Heterosexuality by McWhirter, Sanders, and Reinisch) stated 13.95% of males and 4.25% of females had “extensive” or “more than incidental” homosexual experience.
A 1993 study (The Janus Report on Sexual Behavior - Janus and Janus) found 9% of men and 5% of women were involved in frequent or ongoing homosexual experiences.
A 1994 study (The Social Organization of Sexuality: Sexual Practices in the United States - Laumann, Gagnon, Michael, Michaels) reported that the incidence rate of homosexual desire for men is 7.7% and 7.5% for women.
In 1995, a survey (The prevalence of homosexual behavior and attraction in the United States, the United Kingdom and France: Results of national population-based samples - Sell, Wells, and Wypij) reported 6.2% of U.S. males and 3.6% of U.S. females with “sexual contact with someone of the same sex only or with both sexes in the previous five years.”