This file defines NPCs reaction modifier associated to the CRE charisma value.
First row is the PC's/NPC's charisma.
2nd row is the reaction modifier of the other NPCs that have interaction with PC/NPC with charisma from first column.
In BG1 TotS we have:

2DA V1.0
0
  1   2  3  4  5  6   7  8   9  10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
1 -10 -9 -8 -7 -6 -5 -4 -2  -1  0  0  0  1  2  3  4  4  5  8  9  10 11 12 13 14