When Google provides information on user data requests?

Google reports that in the second half of 2012 company got 21 389 user data requests from federal agencies and governments from all over the world. Almost 40% of all requests comes from the U.S. authorities. In case of the U.S. authorities, Google provides some information for 90-80% of user data requests. Singapore, Taiwan and United Kingdom get some information from Google in 70-75% of requests. Russia, Turkey, Irland and Hungary have vary low chances to obtain requested information from Google.
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