| Value | Category | Cases | |
|---|---|---|---|
| -9999 | inapplicable | 12993 |
99.9%
|
| -3 | non-response | 0 |
0%
|
| -2 | non response | 2 |
0%
|
| -1 | non response | 0 |
0%
|
| 1977 | 1 |
0%
|
|
| 1981 | 1 |
0%
|
|
| 1987 | 1 |
0%
|
|
| 1996 | 1 |
0%
|
|
| 1997 | 1 |
0%
|
|
| 2000 | 1 |
0%
|
|
| 2001 | 1 |
0%
|
|
| 2003 | 1 |
0%
|