What percentage of adopted children look for birth parents?

As an adopted child I'll let you know what I believe.

All children THINK they want to meet their biological parents. And I'm not just saying it- but they ALL THINK they do. And if it doesn't put the child in danger and you've warned them about the consequences- then you gotta let them learn. I learned the hard way, but I learned for myself and don't resent my parents because they let ME choose. I guarantee for the most part they will change their minds and come crawling back to you