It is the first report analyzing trends in the department’s data on so-called stop-and-frisk tactics, and the fifth to be filed by the monitor, Peter L. Zimroth, to Judge Analisa Torres since a 2013 decision that found the department’s tactics to be unconstitutional.

On one hand, the report offers the most comprehensive review of recent citywide street stop activity. It shows that overall stops declined in the three years the monitor studied: to 22,563 in 2015, from 191,851 in 2013, a period in which violent crime in New York continued its decline.

Over those same years, the share of stops in which officers detained people to frisk them increased, as did the share in which officers used force, made arrests and seized guns and contraband, like drugs. As overall stops declined and fewer people were affected, officers were also stopping fewer innocent people. Making fewer, more effective, stops is one of the Police Department’s goals.

Before stopping someone, officers must suspect a crime has occurred, or is about to. The data showed a greater share of stops came after officers reasonably suspected a serious crime, such as murder or weapons possession. Less often did they stop someone for suspected low-level crimes — property crime, drugs, trespassing or so-called quality of life offenses.

The report focused on racial disparity in street stops, but not on the other question before the monitor: ensuring that the department’s stop-and-frisk practices are constitutional.