Currently China, per capita El Salvador. US scores second most population wise (3rd most populous country, so it’s not that unreasonable?) and 5th per capita (No excuse).
The US appears to have been slowly going down a little bit, some times when it feels like it, more so if you’re white, with a big drop during Covid.
Because we’re all popping open the shell to repair our broken phones? Phones are like the least serviceable thing ever.