| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every year | 2895 |
16.7%
|
| 2 | Once every three years | 945 |
5.4%
|
| 3 | Once over three years | 672 |
3.9%
|
| 4 | No increase | 9773 |
56.3%
|
| 5 | Doesn't know | 2927 |
16.9%
|
| 6 | No remuneration | 117 |
0.7%
|
| 9 | Missing value | 16 |
0.1%
|