i assume you find it on google.
http://www.mens-hormonal-health.com/...ne-levels.html
(though i found that by reading a post that was found by google.... Google, especially in wanting to be very "friendly" and "helpful" and automatic in interpreting searches, is making it harder to actually find useful stuff.)
Also, i'll mention that, unlike that page, my personal bias is AGAINST TRT for the young and early middle-aged. but there are a couple of other threads around here hashing that out already.