The New Zealand census, conducted every five years, has always contained a question about whether the respondent is male or female, but this is as far as it goes. There is no option to identify in non-binary ways and nor does the census ask if New Zealanders are gay, straight, bisexual or other. The line might be "no sex please, we're the census". The closest the census has come so far to the sexuality question is finding out, in the 2013 census, that 16,660 people lived in same-sex couples. LGBTI activists are correct in saying that without census data, there is no way of knowing exactly how numerous their community is or where it is located.

Source: Stuff January 11, 2018 16:41 UTC