| Valor | Categoría | Casos | |
|---|---|---|---|
| 2008 | 41 |
0%
|
|
| 2009 | 858 |
0.4%
|
|
| 2010 | 22102 |
10.5%
|
|
| 2011 | 187923 |
89.1%
|
|
| Sysmiss | 7523 |