| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 1 |
0.4%
|
|
| 1997 | 2 |
0.8%
|
|
| 1998 | 2 |
0.8%
|
|
| 1999 | 1 |
0.4%
|
|
| 2000 | 6 |
2.5%
|
|
| 2001 | 6 |
2.5%
|
|
| 2002 | 29 |
12.2%
|
|
| 2003 | 35 |
14.8%
|
|
| 2004 | 47 |
19.8%
|
|
| 2005 | 63 |
26.6%
|
|
| 2006 | 44 |
18.6%
|
|
| 2007 | 1 |
0.4%
|
|
| 9999 | 9999. Don't know | 0 |
0%
|
| Sysmiss | 762 |