Sunroofs Are Growing in Size and Popularity. Rules Haven’t Kept Up.

With sunroofs becoming increasingly popular, consumer advocates worry that the danger will grow.

About seven million, or 40 percent, of the 2017 model year cars and light trucks sold in the United States came with a sunroof, compared with 33 percent for the 2011 model year, according to WardsAuto, a trade publication.

Crash data is not as up-to-date, but it is still troubling. About 300 people were killed and about 1,400 injured every year from 1997 to 2008 when they were thrown out of sunroofs, whether open or closed, the N.H.T.S.A. said in 2011. In 2016, the agency did a more limited study of ejections through closed sunroofs only: Between 2002 and 2012, about 230 people were killed and 500 injured each year.

In a statement, the agency said it was “actively looking into this issue and continues to analyze information related to the

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