Reading statistics like this I'm always surprised at what a small percentage of the population actually is homosexual, it would lead me suspect that homosexuals are over represented in TV, film, fiction and the media.
Homosexuality itself is probably over represented as a political issue and cultural issue of pressing importance too.
I dont think that typology and sexuality can be correlated, even if there are a lot of self-reports because MBTI is far from an exacting and undisputed science when it comes to things it clearly aims to explain such as preferences for particular cognitive sets such as intuition, sensing, feeling, thinking, perceiving, judging let alone sexuality.
To be honest its very difficult to discover any theories about the genesis of sexual orientation which are accepted or acceptable universally, certainly not within the homosexual community itself or its various political organs, genetic causation, innateness, estragen in the womb, cultural influences within the home or wider society, including vogues and trends, have all been embraced and rejected at different times, usually when they have been perceived as more validating and then dismissed when problems arise, such as serving one type of homosexuality well but not another such as bisexuality (not strictly homosexuality but usually categorised as the same, or broadly similar, by supporters and detractors alike for different reasons, its curious how bisexuals could be an "other" for both the heterosexual and homosexual communities).
Most of the better Freudian and Jungian explanations of homosexuality have been dismissed as politically incorrect and tantamount to hate crimes by pretty much all schools of thought in psychology or psycho-analysis since about the sixties or seventies. If any attempt is being made to tie MBTI to sexual orientation wouldnt it just be considered too tainted by its origins in the theories of Jung and by extention Freud?