| Value | Category | Cases | |
|---|---|---|---|
| 1 | only from P.D.S. | 8983 |
7.8%
|
| 2 | only from other sources | 62161 |
54.2%
|
| 3 | from both sources | 23523 |
20.5%
|
| 4 | not purchased | 20084 |
17.5%
|