| Value | Category | Cases | |
|---|---|---|---|
| 1970 | 1 |
1.1%
|
|
| 1980 | 2 |
2.2%
|
|
| 1981 | 1 |
1.1%
|
|
| 1987 | 1 |
1.1%
|
|
| 1990 | 2 |
2.2%
|
|
| 1991 | 1 |
1.1%
|
|
| 1993 | 2 |
2.2%
|
|
| 1994 | 1 |
1.1%
|
|
| 1996 | 1 |
1.1%
|
|
| 1999 | 1 |
1.1%
|
|
| 2002 | 2 |
2.2%
|
|
| 2003 | 2 |
2.2%
|
|
| 2004 | 4 |
4.3%
|
|
| 2005 | 4 |
4.3%
|
|
| 2006 | 2 |
2.2%
|
|
| 2007 | 3 |
3.3%
|
|
| 2008 | 7 |
7.6%
|
|
| 2009 | 42 |
45.7%
|
|
| 2010 | 12 |
13%
|
|
| 9997 | no sabe | 1 |
1.1%
|
| 9999 | no responde | 0 |
0%
|
| Sysmiss | 353 |