How to generate shot numbers automaticaly in a sequence ?

Hello.

I'm a working on animatics edits.

I would like to generate a number counter on my screen that counts the shots. Somewhat like timecode but the count is shot based; unlike the linear nature of timecode. It would be great to generate it automaticaly  incase there are any last minute edits before locking the picture.

Right now, I am placing each number individually with the text tool but there must be a better more efficient way of doing this.

any tips ?

Thanks in advance!