| Value | Category | Cases | |
|---|---|---|---|
| 1989 | 7 |
0%
|
|
| 1990 | 1 |
0%
|
|
| 1991 | 6 |
0%
|
|
| 1993 | 16 |
0.1%
|
|
| 1994 | 1 |
0%
|
|
| 1995 | 15 |
0.1%
|
|
| 1996 | 30 |
0.1%
|
|
| 1997 | 16 |
0.1%
|
|
| 1998 | 58 |
0.2%
|
|
| 1999 | 59 |
0.2%
|
|
| 2000 | 80 |
0.3%
|
|
| 2001 | 73 |
0.3%
|
|
| 2002 | 136 |
0.6%
|
|
| 2003 | 194 |
0.8%
|
|
| 2004 | 235 |
1%
|
|
| 2005 | 221 |
0.9%
|
|
| 2006 | 220 |
0.9%
|
|
| 2007 | 202 |
0.9%
|
|
| 2008 | 91 |
0.4%
|
|
| 2009 | 7 |
0%
|
|
| 9997 | inconsistent | 6 |
0%
|
| 9998 | dk | 148 |
0.6%
|
| 9999 | missing | 10 |
0%
|
| Sysmiss | 21884 |
92.3%
|