Persistent tracking of trigger being triggered

I have a map that I would like to show persistent stats of a players round wins in a billboard after interacting with a button. My game has a specific win condition where the winning player gets teleported via a trigger device, so I would like the wins to increment for the triggering player on it being triggered. I would like to have 12 seperate buttons and billboards so that each of my 12 players can check the stat at any time. I have been struggling with coding this and was wondering if anyone knows where to get started with this or if anyone has this code or a template for it