| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 1 |
1%
|
|
| 1999 | 1 |
1%
|
|
| 2000 | 4 |
4.1%
|
|
| 2001 | 6 |
6.2%
|
|
| 2002 | 12 |
12.4%
|
|
| 2003 | 6 |
6.2%
|
|
| 2004 | 15 |
15.5%
|
|
| 2005 | 16 |
16.5%
|
|
| 2006 | 19 |
19.6%
|
|
| 2007 | 8 |
8.2%
|
|
| 9898 | 3 |
3.1%
|
|
| 998 | 1 |
1%
|
|
| 9998 | 5 |
5.2%
|