Law enforcement demand for Verizon customer data dropped from 149,810 requests in the first half of 2015 to 139,568 requests in the second half of the year, according to Verizon’s latest U.S. Transparency Report.

National security demands from the FBI also decreased in the second half of the year, dropping to a range of 0 to 499 requests from a range of 0 to 999 requests in the first half of 2015, the report indicated. Requests for content issued under the Foreign Intelligence Surveillance Act (FISA) were also down in 2015, dropping from 0 to 999 requests for 2000 to 2999 customer identifiers in the second half of 2014 to 0 to 499 requests for 1500 to 1999 customer identifiers in the first half of 2015.

The government has issued a six month delay on the reporting of FISA data, making the figures from the first half of 2015 the most recent available.

According to Verizon, law enforcement requests for consumer data can be broken down into three categories: subpoenas, orders, warrants, and emergency requests from law enforcement. Orders can further be separated into the categories of General Orders, Pen Registers/ Trap and Trace Orders and Wiretap Orders.

In the second half of 2015, Verizon received 65,663 subpoenas, 33,813 orders, 14,248 warrants and 25,844 emergency requests. The issuance of all types of demand dropped across the board, including Wiretap Orders, which dipped to 567 from 767 in the first half of 2015.

Where subpoenas and orders compel the carrier to turn over certain user data, Verizon said emergency requests are “made in response to active violent crimes, bomb threats, hostage situations, kidnappings and fugitive scenarios, often presenting life-threatening situations” as well as “in search and rescue settings or when law enforcement is trying to locate a missing child or elderly person.”  

Of the 25,844 emergency requests issued instances involving the danger of death or serious physical injury, 16,798 requests were from Public safety Access Points (PSAPs) seeking information for emergency services related to particular 911 calls from the public.

Verizon said in its report that the “vast majority” of demands relate to its consumer customers. The carrier said it receives “relatively few” demands for information regarding its enterprise customers.

Verizon stressed that it does not release customer information unless authorized or required by law.