| Value | Category | Cases | |
|---|---|---|---|
| 1 | Periodic subscription | 7 |
0.1%
|
| 2 | Buy it | 48 |
0.7%
|
| 3 | Borrow it | 27 |
0.4%
|
| 4 | On the internet | 614 |
9.4%
|
| 5 | For free | 30 |
0.5%
|
| Sysmiss | 5774 |