| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 4 |
10.5%
|
|
| 2010 | 29 |
76.3%
|
|
| 2011 | 5 |
13.2%
|
|
| 9997 | no sabe | 0 |
0%
|
| 9999 | no responde | 0 |
0%
|
| Sysmiss | 463 |