| Value | Category | Cases | |
|---|---|---|---|
| 1975 | 25 |
0.8%
|
|
| 1976 | 7 |
0.2%
|
|
| 1978 | 21 |
0.6%
|
|
| 1979 | 17 |
0.5%
|
|
| 1980 | 29 |
0.9%
|
|
| 1981 | 11 |
0.3%
|
|
| 1982 | 9 |
0.3%
|
|
| 1983 | 34 |
1%
|
|
| 1984 | 51 |
1.5%
|
|
| 1985 | 47 |
1.4%
|
|
| 1986 | 36 |
1.1%
|
|
| 1987 | 58 |
1.7%
|
|
| 1988 | 32 |
1%
|
|
| 1989 | 69 |
2.1%
|
|
| 1990 | 78 |
2.3%
|
|
| 1991 | 87 |
2.6%
|
|
| 1992 | 93 |
2.8%
|
|
| 1993 | 89 |
2.7%
|
|
| 1994 | 101 |
3%
|
|
| 1995 | 91 |
2.7%
|
|
| 1996 | 86 |
2.6%
|
|
| 1997 | 129 |
3.9%
|
|
| 1998 | 165 |
5%
|
|
| 1999 | 119 |
3.6%
|
|
| 2000 | 188 |
5.6%
|
|
| 2001 | 131 |
3.9%
|
|
| 2002 | 157 |
4.7%
|
|
| 2003 | 147 |
4.4%
|
|
| 2004 | 106 |
3.2%
|
|
| 2005 | 207 |
6.2%
|
|
| 2006 | 227 |
6.8%
|
|
| 2007 | 264 |
7.9%
|
|
| 2008 | 400 |
12%
|
|
| 2009 | 19 |
0.6%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 3 |
0.1%
|
| Sysmiss | 19201 |