| Valor | Categoría | Casos | |
|---|---|---|---|
| 2001 | 2001 | 25 |
8.9%
|
| 2002 | 2002 | 38 |
13.5%
|
| 2003 | 2003 | 12 |
4.3%
|
| 2004 | 2004 | 16 |
5.7%
|
| 2005 | 2005 | 26 |
9.2%
|
| 2006 | 2006 | 27 |
9.6%
|
| 2007 | 2007 | 21 |
7.4%
|
| 2008 | 2008 | 34 |
12.1%
|
| 2009 | 2009 | 19 |
6.7%
|
| 2010 | 2010 | 34 |
12.1%
|
| 9999 | Se ignora | 30 |
10.6%
|