Facebook received 9,000-10,000 requests for user data from US government entities in the second half of 2012.
The social-networking site said the requests, relating to between 18,000 and 19,000 accounts, covered issues from local crime to national security.
Microsoft meanwhile said it received 6,000 and 7,000 requests for data from between 31,000 and 32,000 accounts.
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