They are only AKC registration statistics though. I doubt a lot of working BCs are registered. I suppose you can get a general ballpark idea from it but I don't think there is a way to get a completely accurate list on popularity. I saw one awhile back when I was looking around that actually had lists by region. I.e. in MN sporting breeds were mostly towards the top, MN being such an "outdoorsman" type state. Where as larger cities had more dogs like yorkies and toy breeds.