| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 1 |
5%
|
|
| 1998 | 1 |
5%
|
|
| 2001 | 1 |
5%
|
|
| 2002 | 1 |
5%
|
|
| 2003 | 6 |
30%
|
|
| 2004 | 6 |
30%
|
|
| 2005 | 2 |
10%
|
|
| 2006 | 2 |
10%
|
|
| Sysmiss | 902 |