| Value | Category | Cases | |
|---|---|---|---|
| 1974 | 1 |
5%
|
|
| 1997 | 1 |
5%
|
|
| 2000 | 1 |
5%
|
|
| 2001 | 1 |
5%
|
|
| 2002 | 2 |
10%
|
|
| 2004 | 1 |
5%
|
|
| 2005 | 1 |
5%
|
|
| 2006 | 1 |
5%
|
|
| 2008 | 2 |
10%
|
|
| 2009 | 2 |
10%
|
|
| 2010 | 4 |
20%
|
|
| 2013 | 1 |
5%
|
|
| 9998 | don't know | 2 |
10%
|
| Sysmiss | 16410 |