Alphabet Inc's Google said it had received between 0 and 499 National Security Letters requesting information on between 1,000 and 1,499 user accounts in the first half of 2017. A year previously, the number of requests was the same but the government asked about only 500 to 999 accounts, according to Google's transparency report. Its 2017 FISA request numbers were not yet available. It was not immediately clear what drove the increase in requests to Apple. But Andrew Crocker, a staff attorney with the Electronic Frontier Foundation, said that the number of government requests to technology companies has been increasing since 2014, when data first started to become available as part of a settlement between technology firms and the government. “There’s not a huge track record here, but you can start to make a simple graph. The trend does seem to be upward,” Crocker said. Crocker also said the higher requests to Apple could represent it coming in line with its peers. Despite Apple’s huge user base - it has sold more than 1.2 billion iPhones - the number of requests to it had been relatively low compared with firms like Google or Microsoft. National security letters are a type of government subpoena for communications data sent to service providers. They are usually issued with a gag order, meaning the target is often unaware that records are being accessed, and they do not require a warrant.