| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 22 |
1.2%
|
| 1 | Not need | 1042 |
56.7%
|
| 2 | Too costly or risky to apply | 65 |
3.5%
|
| 3 | Support is too small or unlikely | 500 |
27.2%
|
| 4 | Other | 208 |
11.3%
|
| Sysmiss | 8835 |