| Value | Category | Cases | |
|---|---|---|---|
| 0 | was here | 128 |
84.2%
|
| 1976 | 1 |
0.7%
|
|
| 1981 | 1 |
0.7%
|
|
| 1983 | 1 |
0.7%
|
|
| 1985 | 1 |
0.7%
|
|
| 1987 | 1 |
0.7%
|
|
| 1988 | 1 |
0.7%
|
|
| 1990 | 1 |
0.7%
|
|
| 1991 | 1 |
0.7%
|
|
| 1992 | 1 |
0.7%
|
|
| 1994 | 1 |
0.7%
|
|
| 1995 | 3 |
2%
|
|
| 1998 | 5 |
3.3%
|
|
| 1999 | 1 |
0.7%
|
|
| 2000 | 4 |
2.6%
|
|
| 2001 | 1 |
0.7%
|
|
| Sysmiss | 1457 |