| Value | Category | Cases | |
|---|---|---|---|
| 1 | Are taken directly from establishment records | 18 |
15.1%
|
| 2 | Are estimates computed with some precision | 82 |
68.9%
|
| 3 | Are arbitrary and unreliable numbers | 10 |
8.4%
|
| 4 | Are in some case taken from books and in some case estimates | 9 |
7.6%
|
| Sysmiss | 1 |