Latest stable version Asterisk server?

What is the latest stable version of Asterisk server and when it was released?

Actually, I am using the version 13 LTS, but I heard that 16 was released.

How can I discover what is the upgrades for the both version?

What searching have you done already to determine the answers to your questions?

I entried in asterisk.org and saw the version 16 LTS… but I was checked it some months ago and I remember that 16 was not LTS, then when it was relesead? And the updates in this version, do you know how can I discover it?

How did you determine that 16 is not an LTS release? What searching turned up that information?

What searching have you done already to find out the release date of a particular release?

What searching have you done already to try and determine the changes in a particular version?

I searched in Google and 16 version was released in 2018-10-09.

And the upgrades I found too in a blog.