it's not just the ratio of children to adults (which is in the bylaws, as to be able to support the children with a certain level of income), but also the ratio of adults to older adults. TO has an aging population, and the younger adults have to support them financially. TO has a very complicated organizational structure, becuase communes are hard to run fairly.... everyone has to work, everyone has to eat and all the community members need to be cared for, young or old.
if you are not feeling well, you just write on your time sheet "sick" and your hours are covered in full, in order to cover this in the community, there has to be a pool of adults who can work the 46 hours a week needed to do this.
technically, when you add and divide, each adult at TO has an annual income of less than $6000. so in order to be able to pay for private school (many of the kids attend private school), have extras for them at the community and care for them since they do not generate income, there is a ratio of adults to kids, and when i was there they were also trying to figure a ratio of under 60 to over 60.
it has nothing to do with descriminating, TO operates on feminist principles, it has to do with being able to afford things like school, food, clothes, books, good housing, extra medical care, etc for all the children that are there. (and the older adults too)
and don't you believe that website about 85 adults and 15 kids, it's said that for 10 years!! numbers change all the time there and no one updates the site... cause it would just be too big a PITA.