It's just your best score on each hole, over the 9 Rounds.
As an example, your best score for the "3rd hole", or 3rd listed player, is par, so you have a 0 there.
You can only ever improve your score, it can never go backwards.
At the start of the tournament, there were 9 games, so it was theoretically possible to score 8 x -3's.
With only 3 games left, those who have 0 x -3's can only achieve what you already have, 3 x -3's.
As an example, your best score for the "3rd hole", or 3rd listed player, is par, so you have a 0 there.
You can only ever improve your score, it can never go backwards.
At the start of the tournament, there were 9 games, so it was theoretically possible to score 8 x -3's.
With only 3 games left, those who have 0 x -3's can only achieve what you already have, 3 x -3's.