Ake's figure that only 2% of the population is homosexual is a bit (!) off.

Latest figures:

2010
The National Survey of Sexual Health and Behavior found that between the ages of 14 and 94, 7 percent of women and 8 percent of men identify as gay, lesbian or bisexual, and that by age 50, 15% of men have had at least one oral sex encounter with another man.

In the United States, the largest population of gays is (surprise surprise!) San Francisco, with 15%. Close behind is Seattle with 12%. I do not have ready at hand figures for cities such as New York and Chicago. Statistics around the world reflect roughly the same percentages.

Don Firth