percentage of (Unknown city)

Hello,
I tried your service in my free counter http://www.anormal-tracker.de and used the lookup with about 40 different IPs. The most city that was returned is: (Unknown city).
So can you please give me the percentage of known cities for the IP addresses?
I tried your service in my free counter http://www.anormal-tracker.de and used the lookup with about 40 different IPs. The most city that was returned is: (Unknown city).
So can you please give me the percentage of known cities for the IP addresses?