| Value | Category | Cases | |
|---|---|---|---|
| 1978 | 2 |
0.3%
|
|
| 1982 | 1 |
0.2%
|
|
| 1984 | 2 |
0.3%
|
|
| 1985 | 3 |
0.5%
|
|
| 1986 | 1 |
0.2%
|
|
| 1987 | 2 |
0.3%
|
|
| 1988 | 1 |
0.2%
|
|
| 1989 | 1 |
0.2%
|
|
| 1990 | 5 |
0.8%
|
|
| 1991 | 7 |
1.1%
|
|
| 1992 | 5 |
0.8%
|
|
| 1993 | 9 |
1.4%
|
|
| 1994 | 18 |
2.7%
|
|
| 1995 | 13 |
2%
|
|
| 1996 | 18 |
2.7%
|
|
| 1997 | 19 |
2.9%
|
|
| 1998 | 30 |
4.5%
|
|
| 1999 | 18 |
2.7%
|
|
| 2000 | 34 |
5.1%
|
|
| 2001 | 23 |
3.5%
|
|
| 2002 | 49 |
7.4%
|
|
| 2003 | 56 |
8.5%
|
|
| 2004 | 41 |
6.2%
|
|
| 2005 | 53 |
8%
|
|
| 2006 | 70 |
10.6%
|
|
| 2007 | 87 |
13.1%
|
|
| 2008 | 84 |
12.7%
|
|
| 2009 | 8 |
1.2%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 2 |
0.3%
|
| Sysmiss | 5417 |