| Value | Category | Cases | |
|---|---|---|---|
| 1 | traditional | 6690 |
78%
|
| 2 | improved | 1384 |
16.1%
|
| 11 | both traditional | 398 |
4.6%
|
| 12 | traditional and improved | 91 |
1.1%
|
| 22 | both imroved | 9 |
0.1%
|
| Sysmiss | 215 |