A new study from the Trevor Project reports that about 1/4th of LGBTQ+ youth use gender-neutral and nonbinary pronouns. For their latest survey, the Trevor Project (the nation's leading organization providing crisis intervention and suicide prevention services to LGBTQ+ folks under 25) interviewed about 40,000 LGBTQ+ people between the ages of 13 and 25 and found that 25 percent use pronouns outside of she/her and he/him.
This means around 10,000 people in the group they surveyed use gender-neutral pronouns like they/them, ze/zir, or fae/faer exclusively, or answer to a combination of those pronouns alongside he/him and she/her.