| Value | Category | Cases | |
|---|---|---|---|
| 1993 | 1 |
0.1%
|
|
| 1995 | 2 |
0.1%
|
|
| 1998 | 2 |
0.1%
|
|
| 1999 | 1 |
0.1%
|
|
| 2000 | 10 |
0.7%
|
|
| 2001 | 15 |
1.1%
|
|
| 2002 | 7 |
0.5%
|
|
| 2003 | 38 |
2.7%
|
|
| 2004 | 46 |
3.3%
|
|
| 2005 | 65 |
4.7%
|
|
| 2006 | 91 |
6.5%
|
|
| 2007 | 306 |
22%
|
|
| 2008 | 620 |
44.6%
|
|
| 9999 | Not remember | 187 |
13.4%
|
| Sysmiss | 1271 |