(CNN) — Chicago is reporting a significant drop in homicides for the third straight year, news that city leaders are embracing after the Windy City was singled out for gun violence during a particularly deadly 2016.

The nation’s third-most populous city has recorded 490 murders in 2019 as of Tuesday morning, Chicago police say — about 13% lower than 2018’s total of 564.

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That also would be a roughly 35% drop from 2016, when Chicago reported its highest number of homicides in two decades: 756.

Shootings also are down. The police department’s preliminary tally of shootings for the year — 2,139 — is about 9.6% lower than 2018’s count of 2,367.

Chicago police are expected to announce another preliminary murder and shooting count on Tuesday night, the final hours of 2019. The numbers may change even after that — final counts will be released after an FBI audit is completed in the next few weeks.

Still, city leaders have expressed hope that efforts undertaken since 2016 — hiring more police officers, emphasizing community policing and making investments in social services and schools — are helping to lessen violent crime.

They also credit what they call data-driven policing. The department in recent years has created support centers where supervisors use information from many sources and technologies — including security cameras and gunshot detection systems — to learn where crimes are happening and where they are likely to occur.

“I think that all of those things working together — being on the ground, supporting vulnerable victims, supporting vulnerable communities — led to the declines that we saw this year, and particularly over the course of the summer,” Chicago Mayor Lori Lightfoot told CNN’s “New Day” on Monday.

The preliminary count suggests Chicago had close to the number of murders in 2019 as it did in 2015, when the tally was 478.

Chicago-area resident Keith Flowers would like the violence to drop further still. Flowers, 52, lost his son to a shooting in Chicago in August.

He said he is grateful that the rates of shootings and homicides are dropping, but there is a long way to go before he feels safe.

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“You can’t let your kids out to play because you don’t know when a drive-by or a shooting is going to take place. So no, we don’t feel safe. I don’t feel safe,” he told CNN.

Trump has criticized Chicago’s violence

The decrease in slayings comes as President Donald Trump has repeatedly criticized Chicago’s violence, particularly in 2017. At the time, he said Chicago was “totally out of control” and tweeted that he “will send in the Feds!” At a speech to a group of police chiefs in 2018, he voiced support for punitive “stop and frisk” policies to solve “problems like Chicago.”

Even last month, as the murder rate continued to decline, Trump criticized Chicago’s “crime wave.”

“Chicago will never stop its crime wave with the current Superintendent of Police. It just won’t happen!” he said in a tweet in November. “Thank you to Kevin Graham and all of the GREAT Chicago Police Officers I just had the privilege to meet. Tremendous crime fighting potential if allowed to do your thing!”

Chicago Police superintendent Eddie Johnson, who had led the department for the past three years, was fired in December after Lightfoot said he lied about an October incident. The decline in Chicago’s violent crime rate largely tracks with his tenure.

The city’s crime rate has also been cited in the partisan political debate about gun rights. As a liberal city, Chicago has strict gun-control policies, so some gun-rights advocates point to the city’s crime rate in an effort to prove that gun control is ineffective.

After mass shootings in El Paso and Dayton this year reignited the debate over gun control, for example, Ivanka Trump tweeted, “let us not overlook that Chicago experienced its deadliest weekend of the year.”

But the gun violence problem in Chicago is more complicated. Many of the guns used in the city’s shootings were purchased out of state.

“We border Indiana and Wisconsin, which have really lax gun laws,” Johnson said in 2016. “We know that people from Chicago go across the border, fill up gym bags with illegal weapons from gun shows and things of that nature and they come back here and sell them to the gangs.”

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