| Value | Category | Cases | |
|---|---|---|---|
| 1 | only from P.D.S. | 23039 |
19.7%
|
| 2 | only from other sources | 36672 |
31.3%
|
| 3 | from both sources | 49550 |
42.4%
|
| 4 | not purchased | 7732 |
6.6%
|