This file defines the number of spells at each magic level a shaman knows at each level.
The first column lists the shaman level.
Subsequent columns list the spell levels.
In BG2EE we have:

2DA V1.0
0
        1   2   3   4   5   6   7
1       2   0   0   0   0   0   0
2       2   0   0   0   0   0   0
3       3   0   0   0   0   0   0
4       3   1   0   0   0   0   0
5       4   2   0   0   0   0   0
6       4   2   1   0   0   0   0
7       5   3   2   0   0   0   0
8       5   3   2   1   0   0   0
9       5   4   3   2   0   0   0
10      5   4   3   2   1   0   0
11      5   5   4   3   2   0   0
12      5   5   4   3   2   1   0
13      5   5   4   4   3   2   0
14      5   5   4   4   3   2   1
15      5   5   4   4   4   3   2
16      5   5   4   4   4   3   2
17      5   5   4   4   4   3   3
18      5   5   4   4   4   3   3
19      5   5   4   4   4   3   3
20      5   5   4   4   4   3   3
21      5   5   4   4   4   4   3
22      5   5   5   4   4   4   4
23      5   5   5   5   4   4   4
24      5   5   5   5   4   4   4
25      5   5   5   5   4   4   4
26      5   5   5   5   4   4   4
27      5   5   5   5   4   4   4
28      5   5   5   5   5   4   4
29      5   5   5   5   5   4   4
30      5   5   5   5   5   5   4
31      5   5   5   5   5   5   5
32      5   5   5   5   5   5   5
33      5   5   5   5   5   5   5
34      5   5   5   5   5   5   5
35      5   5   5   5   5   5   5
36      5   5   5   5   5   5   5
37      5   5   5   5   5   5   5
38      5   5   5   5   5   5   5
39      5   5   5   5   5   5   5
40      5   5   5   5   5   5   5