Again, Google leads the way in transparency about government demands for user information.
This time, they've added numbers for National Security Letters (a form of administrative subpoena that the FBI can use to get non-content information about users). The numbers are not precise, apparently because reporting actual information about NSLs is illegal under the relevant statutes. But some information is better than no information.
Check out the official Google blog post about this addition to the Transparency Report: Official Blog: Transparency Report: Shedding more light on National Security Letters.