| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes : forwork. | 30820 |
6.3%
|
| 2 | Yes :additional work. | 20356 |
4.2%
|
| 3 | Yes : alternative work | 6974 |
1.4%
|
| 4 | No | 431860 |
88.1%
|