Ask the AKC. You can see the top 25 at the chronicle website.
I can find the top 25 in sporting GROUP but not the top 25 in labradors…any other ideas?
http://caninechronicle.com/statistics/
The Canine Chronicle only lists the top 20 in each Breed. I don't know where to tell the original Poster where to look. Sorry.
Are you looking for this? http://classic.akc.org/grand_championship/index.cfm?type=gc&display You may need an account to log into if you haven't already signed up, but these searches (by year or lifetime)are free...