| Value | Category | Cases | |
|---|---|---|---|
| 1992 | 1 |
0.7%
|
|
| 1996 | 1 |
0.7%
|
|
| 2004 | 2 |
1.3%
|
|
| 2006 | 3 |
2%
|
|
| 2007 | 8 |
5.3%
|
|
| 2008 | 14 |
9.3%
|
|
| 2009 | 50 |
33.1%
|
|
| 2010 | 67 |
44.4%
|
|
| 2011 | 5 |
3.3%
|
|
| 9997 | no sabe | 0 |
0%
|
| 9999 | no responde | 0 |
0%
|
| Sysmiss | 350 |