| Value | Category | Cases | |
|---|---|---|---|
| 1960 | 1 |
1.5%
|
|
| 1970 | 1 |
1.5%
|
|
| 1972 | 2 |
3.1%
|
|
| 1980 | 3 |
4.6%
|
|
| 1982 | 1 |
1.5%
|
|
| 1990 | 4 |
6.2%
|
|
| 1998 | 1 |
1.5%
|
|
| 2000 | 4 |
6.2%
|
|
| 2002 | 1 |
1.5%
|
|
| 2004 | 4 |
6.2%
|
|
| 2005 | 4 |
6.2%
|
|
| 2006 | 1 |
1.5%
|
|
| 2007 | 3 |
4.6%
|
|
| 2009 | 1 |
1.5%
|
|
| 2010 | 6 |
9.2%
|
|
| 2011 | 5 |
7.7%
|
|
| 2012 | 13 |
20%
|
|
| 2013 | 8 |
12.3%
|
|
| 9999 | No sabe / No responde | 2 |
3.1%
|
| Sysmiss | 613 |