| Value | Category | Cases | |
|---|---|---|---|
| 99 | Missing | 0 |
0%
|
| 1984 | 1 |
11.1%
|
|
| 2004 | 2 |
22.2%
|
|
| 2006 | 1 |
11.1%
|
|
| 2008 | 2 |
22.2%
|
|
| 2009 | 1 |
11.1%
|
|
| 2011 | 1 |
11.1%
|
|
| 2012 | 1 |
11.1%
|
|
| Sysmiss | 1716 |