| Value | Category |
|---|---|
| 1 | Been the same compared to previous year |
| 2 | decreased |
| 3 | Decreased |
| 4 | decreased compared to previous year |
| 5 | Decreased compared to previous year |
| 6 | increased |
| 7 | Increased |
| 8 | same |
| 9 | Same |
| Missing value |
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