I own a Rottweiler and two German Shepherds. That list was compiled from AKC registration statistics from 2000. This is the 2001 list.

http://www.akc.org/breeds/regstats2001.cfm

1 Retrievers (Labrador)
2 Retrievers (Golden)
3 German Shepherd Dogs
4 Dachshunds
5 Beagles
6 Yorkshire Terriers
7 Poodles
8 Boxers
9 Chihuahuas
10 Shih Tzu

Rottweilers came in 11th. I'm glad their popularity has gone down. People always say popularity is bad for a breed, because when a breed is popular, people will breed any two dogs together just because they can get money off the puppies. They don't care if the parents have hip dysplasia or horrible temperments that will be passed onto the puppies. I think Dobermans and Golden Retrievers are real victims of this, but almost all popular breeds have this problem.