| Value | Category | Cases | |
|---|---|---|---|
| 0 | was here | 244 |
84.7%
|
| 1951 | 1 |
0.3%
|
|
| 1961 | 1 |
0.3%
|
|
| 1967 | 1 |
0.3%
|
|
| 1968 | 1 |
0.3%
|
|
| 1976 | 1 |
0.3%
|
|
| 1982 | 2 |
0.7%
|
|
| 1986 | 1 |
0.3%
|
|
| 1989 | 1 |
0.3%
|
|
| 1990 | 1 |
0.3%
|
|
| 1991 | 2 |
0.7%
|
|
| 1993 | 2 |
0.7%
|
|
| 1994 | 5 |
1.7%
|
|
| 1995 | 2 |
0.7%
|
|
| 1996 | 3 |
1%
|
|
| 1997 | 1 |
0.3%
|
|
| 1998 | 3 |
1%
|
|
| 1999 | 7 |
2.4%
|
|
| 2000 | 7 |
2.4%
|
|
| 2001 | 2 |
0.7%
|
|
| Sysmiss | 1321 |