[A picture of two graphs from the Asexy Census of 2011 detailing romantic orientation and gender identity in the asexual community, among the 3000ish ace-spectrum people surveyed.]
Reblogging for reference, especially for the part that shows that non-heteroromantic aces represent more than 60% of the survey respondents.
These graphs are actually from the 2008 AVEN survey, not the 2011 census. The analysis from the 2011 survey can be found here. (That analysis found that heteroromantics make up 22% of the 2011 survey respondents.)