| Value | Category | Cases | |
|---|---|---|---|
| 1989 | 1 |
0%
|
|
| 1990 | 1 |
0%
|
|
| 1991 | 1 |
0%
|
|
| 1993 | 4 |
0%
|
|
| 1994 | 1 |
0%
|
|
| 1995 | 4 |
0%
|
|
| 1996 | 8 |
0.1%
|
|
| 1997 | 5 |
0%
|
|
| 1998 | 16 |
0.1%
|
|
| 1999 | 19 |
0.2%
|
|
| 2000 | 24 |
0.2%
|
|
| 2001 | 22 |
0.2%
|
|
| 2002 | 43 |
0.3%
|
|
| 2003 | 63 |
0.5%
|
|
| 2004 | 74 |
0.6%
|
|
| 2005 | 69 |
0.6%
|
|
| 2006 | 67 |
0.5%
|
|
| 2007 | 74 |
0.6%
|
|
| 2008 | 33 |
0.3%
|
|
| 2009 | 2 |
0%
|
|
| 9997 | inconsistent | 5 |
0%
|
| 9998 | dk | 54 |
0.4%
|
| 9999 | missing | 5 |
0%
|
| Sysmiss | 11893 |
95.2%
|