What makes you think that other countries aren't seeing the same decline? In France, as far as I can tell, the situation is similar.

For instance, I've seen a lot of interviews like this https://youtu.be/7Pl4rvZ9amc?si=RMm8B1BmSSdNt0vq

My brother, who is a high school teacher in Canada tells me similar stories from his first-hand experience.