| Value | Category | Cases | |
|---|---|---|---|
| 1 | only from P.D.S. | 10520 |
9.5%
|
| 2 | only from other sources | 53012 |
48.1%
|
| 3 | from both sources | 5847 |
5.3%
|
| 4 | not purchased | 40890 |
37.1%
|