| Value | Category | Cases | |
|---|---|---|---|
| 0 | was here | 73 |
85.9%
|
| 1970 | 1 |
1.2%
|
|
| 1990 | 1 |
1.2%
|
|
| 1991 | 2 |
2.4%
|
|
| 1994 | 1 |
1.2%
|
|
| 1996 | 1 |
1.2%
|
|
| 1998 | 1 |
1.2%
|
|
| 1999 | 3 |
3.5%
|
|
| 2000 | 1 |
1.2%
|
|
| 2001 | 1 |
1.2%
|
|
| Sysmiss | 1524 |