| Valor | Categoría | Casos | |
|---|---|---|---|
| 1991 | 27 |
0.1%
|
|
| 1992 | 8 |
0%
|
|
| 1993 | 7 |
0%
|
|
| 1994 | 5 |
0%
|
|
| 1995 | 2 |
0%
|
|
| 1996 | 6 |
0%
|
|
| 1997 | 6 |
0%
|
|
| 1998 | 16 |
0.1%
|
|
| 1999 | 11 |
0.1%
|
|
| 2000 | 56 |
0.3%
|
|
| 2001 | 42 |
0.2%
|
|
| 2002 | 24 |
0.1%
|
|
| 2003 | 27 |
0.1%
|
|
| 2004 | 38 |
0.2%
|
|
| 2005 | 45 |
0.2%
|
|
| 2006 | 90 |
0.4%
|
|
| 2007 | 149 |
0.7%
|
|
| 2008 | 244 |
1.1%
|
|
| 2009 | 584 |
2.7%
|
|
| 2010 | 4605 |
21.5%
|
|
| 2011 | 15474 |
72.1%
|