Drop menu showing users per style/template, but how can I make the number accurate?

[bluecat]

I just installed a drop menu that lets users easily change skins/template styles, but we have almost 4,000 users and it only shows new users for each one (i.e. The default skin shows "6" users using it (at this point), an other skin shows like 13 and the third shows like 19, but obviously over 3,000 are using the default. The question is, how can I update this to reflect "all" the users and not just new people that join up? I know it's kind of silly, but I'm stumped on it. Thank you.