| Value | Category | Cases | |
|---|---|---|---|
| 1 | advertisement | 301 |
33.3%
|
| 2 | through family networks | 105 |
11.6%
|
| 3 | through business networks | 203 |
22.5%
|
| 4 | through friends | 161 |
17.8%
|
| 5 | worker approached firm | 106 |
11.7%
|
| 6 | other (specify) | 27 |
3%
|
| Sysmiss | 2236 |