If the values change per round, but are always the same from tournament to tournament, you could use a set of layout tokens to accomplish this. Not ideal, but I think it would work.
On the Layout tab, press the "Tokens" button in the "Other Controls" section. This opens the Layout Tokens dialog. Basically you can add your own tokens here, which, when inserted into the layout, will show whatever you want them to.
So, add a token named "roundone". Set it to "Text" and also "Plain text". For it's value, put the values for round 1. For example:
1 - 5
2 - 10
3 - 15
4 - 20
.
.
.
19 - 95
20 - 100
Repeat, adding a new token named "roundtwo" with the values for round 2. And so on.
In your layout, choose the cell where this will be displayed. You should probably remove all existing Property Sets, but this will depend on your layout. Create a new property set for the first round. With the new property set selected, press the Conditions button and set the "Level" to "Round number:" "=" "1" and press OK. Edit the "Contents" and set the HTML to:
<roundone>
Repeat, adding a new property set for round 2, using the <roundtwo> token.
Tedious to set up the first time, but it's a one-time setup. Unless those values change, but then you just need to edit the values, not the setup.