There are many factors.
1. Jobs
2. Optimism about the future
3....
Many are secondary to Trump.
Now look as suicide figures, which do not have the same pattern. Why?
How many murderers, How many suicides have common factors?
Accepting or rejecting of reality? Of Family? of the hand dealt you?
Optimism? Pessimism?
Personal Responsibility?
Avoiding Responsibility?
Jobs is number 1 like you say. Less people have less time to get into trouble. Trump effect.