Google said it is negotiating with the US government about what details it is able to reveal regarding data requests made by government agencies.
The company said the "sticking point" is whether it can only publish a combined figure for all requests, Reuters reported.
Google said that would be "a step back for users" because it already breaks out criminal requests and National Security Letters, another type of intelligence inquiry.
More top news
A court has ruled that the original coffin in which Lee Harvey Oswald was buried belongs to his brother, not the undertaker's that sold it.
Manic Street Preachers lyricist went missing nearly 20 years ago but mystery still surrounds exactly what happened to him.
Deputy Prime Minister admitted he wanted to hit David Cameron on more than 20 occasions on late-night chat show 'The Last Leg'.