1·不过位于华盛顿的美国国家跨性别人口平等权利中心(The National Center for Transgender Equality)曾做过调查。据调查显示，这一数字大约在总人口的0.0025%至1%之间。
The National Center for Transgender Equality in Washington, D.C., estimates the number as between.0025 percent and 1 percent of the general population.