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The data, collected in 2019, show that 94.8% of the adult population, equivalent to 150.8 million people, identify as heterosexual, meaning they are sexually or emotionally attracted to people of the opposite sex; 1.2%, or 1.8 million, declare themselves to be homosexual, attracted to people of the same sex or gender; and 0.7%, or 1.1 million, declare themselves to be bisexual, attracted to more than one gender or binary sex.
The survey also shows that 1.1% of the population, equivalent to 1.7 million people, said they did not know how to answer the question, and 2.3%, or 3.6 million, refused to answer. A minority, 0.1%, or 100,000, said they identified with other orientations. According to the IBGE, when asked which, the majority responded that they identified as pansexual—a person whose gender and sex are not determining factors in attraction—or asexual—a person who does not experience sexual attraction.