Value | Category | Cases | |
---|---|---|---|
-99 | DK | 2 |
0.1%
|
-88 | Missing | 0 |
0%
|
-77 | NA | 5 |
0.3%
|
1971 | 1 |
0.1%
|
|
1972 | 1 |
0.1%
|
|
1977 | 17 |
1.1%
|
|
1979 | 1 |
0.1%
|
|
1987 | 3 |
0.2%
|
|
1989 | 1 |
0.1%
|
|
1990 | 4 |
0.3%
|
|
1991 | 5 |
0.3%
|
|
1992 | 5 |
0.3%
|
|
1993 | 3 |
0.2%
|
|
1994 | 8 |
0.5%
|
|
1995 | 45 |
2.9%
|
|
1996 | 39 |
2.5%
|
|
1997 | 132 |
8.4%
|
|
1998 | 205 |
13.1%
|
|
1999 | 338 |
21.5%
|
|
2000 | 751 |
47.8%
|
|
2001 | 4 |
0.3%
|
|
Sysmiss | 5 |