Value | Category | Cases | |
---|---|---|---|
-1 | missing | 0 |
0%
|
1 | very easy | 4571 |
8.6%
|
2 | easy | 8507 |
15.9%
|
3 | difficult | 3104 |
5.8%
|
4 | very difficult | 1364 |
2.6%
|
7 | not applicable | 35868 |
67.1%
|
8 | refused | 4 |
0%
|
9 | don't know | 26 |
0%
|