| Value | Category | Cases | |
|---|---|---|---|
| 1976 | 1 |
0%
|
|
| 1978 | 2 |
0%
|
|
| 1979 | 7 |
0.1%
|
|
| 1980 | 18 |
0.2%
|
|
| 1981 | 19 |
0.2%
|
|
| 1982 | 25 |
0.3%
|
|
| 1983 | 73 |
0.8%
|
|
| 1984 | 88 |
0.9%
|
|
| 1985 | 88 |
0.9%
|
|
| 1986 | 89 |
1%
|
|
| 1987 | 92 |
1%
|
|
| 1988 | 71 |
0.8%
|
|
| 1989 | 85 |
0.9%
|
|
| 1990 | 136 |
1.5%
|
|
| 1991 | 164 |
1.8%
|
|
| 1992 | 190 |
2%
|
|
| 1993 | 215 |
2.3%
|
|
| 1994 | 233 |
2.5%
|
|
| 1995 | 221 |
2.4%
|
|
| 1996 | 243 |
2.6%
|
|
| 1997 | 224 |
2.4%
|
|
| 1998 | 284 |
3%
|
|
| 1999 | 259 |
2.8%
|
|
| 2000 | 389 |
4.2%
|
|
| 2001 | 374 |
4%
|
|
| 2002 | 476 |
5.1%
|
|
| 2003 | 615 |
6.6%
|
|
| 2004 | 902 |
9.7%
|
|
| 2005 | 1280 |
13.7%
|
|
| 2006 | 1927 |
20.7%
|
|
| 2007 | 475 |
5.1%
|
|
| 9997 | Inconsistent | 46 |
0.5%
|
| 9998 | DK | 3 |
0%
|
| 9999 | 49 | ||
| Sysmiss | 5546 |