23andMe recently offered a new survey asking the people in their genetic database to report their ethnicity.
Here is the snapshot of the answers:
Replies to the ancestry/ethnicity question.
People who identify themselves as European comprise three quarters of the database. If you are not of mostly European heritage, you will likely not find many relatives in the database. As more people test, additional relatives will become available, but you need to keep this in mind when you either find very few relatives or all of your relatives look European, especially if you know otherwise in your family tree.