The rest of the world is doing its part, but accidents and deaths have increased in the United States. I guess that makes us one of the “poorer countries”.
Taken from here:
https://en.wikipedia.org/wiki/Motor_vehicle_fatality_rate_in_U.S._by_year
Pedestrian deaths are also up 72% since 2009 in the United States:
https://www.iihs.org/research-areas/fatality-statistics/detail/pedestrians