| value | category | cases | |
|---|---|---|---|
| 1970 | 1 |
0.1%
|
|
| 1973 | 1 |
0.1%
|
|
| 1974 | 1 |
0.1%
|
|
| 1975 | 1 |
0.1%
|
|
| 1976 | 2 |
0.1%
|
|
| 1977 | 2 |
0.1%
|
|
| 1978 | 4 |
0.3%
|
|
| 1979 | 9 |
0.6%
|
|
| 1980 | 15 |
1%
|
|
| 1981 | 6 |
0.4%
|
|
| 1982 | 12 |
0.8%
|
|
| 1983 | 19 |
1.3%
|
|
| 1984 | 17 |
1.2%
|
|
| 1985 | 25 |
1.7%
|
|
| 1986 | 30 |
2.1%
|
|
| 1987 | 29 |
2%
|
|
| 1988 | 37 |
2.5%
|
|
| 1989 | 29 |
2%
|
|
| 1990 | 35 |
2.4%
|
|
| 1991 | 44 |
3%
|
|
| 1992 | 52 |
3.6%
|
|
| 1993 | 62 |
4.3%
|
|
| 1994 | 73 |
5%
|
|
| 1995 | 81 |
5.6%
|
|
| 1996 | 95 |
6.5%
|
|
| 1997 | 111 |
7.6%
|
|
| 1998 | 139 |
9.6%
|
|
| 1999 | 113 |
7.8%
|
|
| 2000 | 102 |
7%
|
|
| 2001 | 109 |
7.5%
|
|
| 2002 | 90 |
6.2%
|
|
| 2003 | 108 |
7.4%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| 9999 | 2 | ||
| Sysmiss | 9189 |