An 18-year-old driver killed in a single-vehicle rollover in Goshen County may have fallen asleep, the Wyoming Highway Patrol says.

Sgt. Jeremy Beck says troopers were called to the crash scene on U.S. 85 near milepost 112, about 10 miles north of Lingle, around 4:15 a.m. Saturday.

Beck says Caleb Brenner, of Upton, was headed north when he failed to negotiate a left-hand curve, went off the east edge of the highway and rolled his pickup end over end.

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Brenner, who was not wearing his seat belt, was ejected and died at the scene.

This is the 84th fatality on Wyoming's highways in 2021 compared to 95 in 2020, 117 in 2019 and 81 in 2018 to date.

READ ON: See the States Where People Live the Longest

Stacker used data from the 2020 County Health Rankings to rank every state's average life expectancy from lowest to highest. The 2020 County Health Rankings values were calculated using mortality counts from the 2016-2018 National Center for Health Statistics. The U.S. Census 2019 American Community Survey and America's Health Rankings Senior Report 2019 data were also used to provide demographics on the senior population of each state and the state's rank on senior health care, respectively.

Read on to learn the average life expectancy in each state.