I believe those are the move times, in seconds.
Scoresheet question

I assume it's recording how much time is on the clock, in minutes.
Remember in top level tournaments it's common to have multiple time controls i.e. a player may get more time on move 40 and/or move 60.
Does anyone know what the 2 digit numbers to the right of the moves are. Example: the 15 after the move e6. This is an image of scoresheets from Gibraltar that I saw online. Just curious.
Thanks