Value | Category | Cases | |
---|---|---|---|
1991 | 1 |
0.2%
|
|
1992 | 1 |
0.2%
|
|
1993 | 2 |
0.4%
|
|
1994 | 1 |
0.2%
|
|
1996 | 3 |
0.6%
|
|
1997 | 470 |
98.3%
|
|
Sysmiss | 443 |