| Value | Category | Cases | |
|---|---|---|---|
| 1967 | 1 |
0%
|
|
| 1970 | 5 |
0.1%
|
|
| 1971 | 2 |
0%
|
|
| 1972 | 12 |
0.2%
|
|
| 1973 | 19 |
0.3%
|
|
| 1974 | 35 |
0.5%
|
|
| 1975 | 46 |
0.6%
|
|
| 1976 | 63 |
0.9%
|
|
| 1977 | 71 |
1%
|
|
| 1978 | 104 |
1.5%
|
|
| 1979 | 99 |
1.4%
|
|
| 1980 | 181 |
2.6%
|
|
| 1981 | 140 |
2%
|
|
| 1982 | 167 |
2.4%
|
|
| 1983 | 171 |
2.4%
|
|
| 1984 | 187 |
2.6%
|
|
| 1985 | 181 |
2.6%
|
|
| 1986 | 181 |
2.6%
|
|
| 1987 | 233 |
3.3%
|
|
| 1988 | 189 |
2.7%
|
|
| 1989 | 204 |
2.9%
|
|
| 1990 | 283 |
4%
|
|
| 1991 | 214 |
3%
|
|
| 1992 | 240 |
3.4%
|
|
| 1993 | 198 |
2.8%
|
|
| 1994 | 196 |
2.8%
|
|
| 1995 | 241 |
3.4%
|
|
| 1996 | 214 |
3%
|
|
| 1997 | 257 |
3.6%
|
|
| 1998 | 231 |
3.3%
|
|
| 1999 | 253 |
3.6%
|
|
| 2000 | 332 |
4.7%
|
|
| 2001 | 247 |
3.5%
|
|
| 2002 | 249 |
3.5%
|
|
| 2003 | 221 |
3.1%
|
|
| 2004 | 254 |
3.6%
|
|
| 2005 | 253 |
3.6%
|
|
| 2006 | 196 |
2.8%
|
|
| 2007 | 118 |
1.7%
|
|
| 9997 | Inconsistent | 1 |
0%
|
| 9998 | Don't know year | 606 |
8.5%
|
| 9999 | 7 | ||
| Sysmiss | 3268 |