| Value | Category | Cases | |
|---|---|---|---|
| 1 | Are taken directly from establishment records | 83 |
13.9%
|
| 2 | Are estimates computed with some precision | 202 |
33.8%
|
| 3 | Are arbitrary and unreliable numbers | 54 |
9%
|
| 4 | Are in some case taken from books and in some case estimates | 258 |
43.2%
|
| Sysmiss | 4 |