The most important thing to reduce suicide rates is to reduce access to means and methods. This is impossible in the US because it means gun owners have to store their weapons in locked cabinets, with the ammunition in a separate place. Or, better, that fewer people own guns.

Some thing that might be possible is to provide training to police so that they don't kill people who are mentally distressed.

It's a bit worrying that this article doesn't mention any definitions or differences in counting over years.