Up-to-date list of user agent distribution [on hold]

Does anybody know where I can find a list of user agents that are used by visitors with their relative frequencies? (Including any bots, etc)

I.e. a list like the following:

• 2% requests with ua string1


• 1% requests with ua string2


• etc

Clearly this depends on the site, so a not-too-obscure site as basis for the collected data would be ideal.