| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not necessary | 1380 |
67.2%
|
| 2 | Too expensive | 147 |
7.2%
|
| 3 | Not available | 510 |
24.8%
|
| 4 | Other,specify | 16 |
0.8%
|
| Sysmiss | 1999 |