The article does say that, but the article is simplifying. If you click through they're citing https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/8117

The article does say that, but the article is simplifying. If you click through they're citing https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/811766 https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/... which says 17% "given similar physical insults". But conditional on being in a crash is not the same thing as conditional on being in a crash of a given severity.