| Value | Category | Cases | |
|---|---|---|---|
| 1967 | 75 |
0.7%
|
|
| 1968 | 133 |
1.2%
|
|
| 1969 | 119 |
1%
|
|
| 1970 | 182 |
1.6%
|
|
| 1971 | 193 |
1.7%
|
|
| 1972 | 165 |
1.4%
|
|
| 1973 | 142 |
1.2%
|
|
| 1974 | 163 |
1.4%
|
|
| 1975 | 166 |
1.4%
|
|
| 1976 | 218 |
1.9%
|
|
| 1977 | 138 |
1.2%
|
|
| 1978 | 209 |
1.8%
|
|
| 1979 | 145 |
1.3%
|
|
| 1980 | 239 |
2.1%
|
|
| 1981 | 254 |
2.2%
|
|
| 1982 | 233 |
2%
|
|
| 1983 | 200 |
1.7%
|
|
| 1984 | 231 |
2%
|
|
| 1985 | 223 |
1.9%
|
|
| 1986 | 361 |
3.2%
|
|
| 1987 | 247 |
2.2%
|
|
| 1988 | 414 |
3.6%
|
|
| 1989 | 259 |
2.3%
|
|
| 1990 | 405 |
3.5%
|
|
| 1991 | 361 |
3.2%
|
|
| 1992 | 306 |
2.7%
|
|
| 1993 | 292 |
2.5%
|
|
| 1994 | 402 |
3.5%
|
|
| 1995 | 300 |
2.6%
|
|
| 1996 | 469 |
4.1%
|
|
| 1997 | 380 |
3.3%
|
|
| 1998 | 544 |
4.8%
|
|
| 1999 | 501 |
4.4%
|
|
| 2000 | 522 |
4.6%
|
|
| 2001 | 484 |
4.2%
|
|
| 2002 | 12 |
0.1%
|
|
| 9997 | Inconsistent | 3 |
0%
|
| 9998 | DK | 1053 |
9.2%
|
| 9999 | Missing | 1 |
0%
|
| Sysmiss | 708 |
6.2%
|