National security requests for user data from Apple doubled in the second half of 2016, compared to the first six months, Apple’s newly-published biannual transparency report reveals.

Apple received somewhere between 5,750 and 5,999 orders during the July-December period of last year, compared to the 2,750 and 2,999 requests it was handed in the January-June period. This represents the highest total count in the 3.5 years since Apple first began releasing this information in a six-monthly report.

In response to the public’s outcry that tech companies are working with the NSA to pilfer personal info on targets of interest, Apple, Google, Microsoft, Facebook, Twitter and others announced an alliance with civil liberties groups today demanding for more transparency by the U.S. government concerning wiretapping.

The coalition sent a letter today to President Obama and other leaders in Congress, urging for greater transparency around national security-related requests. Portions of the letter were published last night, but we now have a copy it in its entirety, which can be read below: