| Value | Category | Cases | |
|---|---|---|---|
| 1990 | 1 |
0.5%
|
|
| 1991 | 2 |
1%
|
|
| 1995 | 3 |
1.6%
|
|
| 1996 | 4 |
2.1%
|
|
| 1997 | 1 |
0.5%
|
|
| 1998 | 4 |
2.1%
|
|
| 1999 | 3 |
1.6%
|
|
| 2000 | 9 |
4.7%
|
|
| 2001 | 10 |
5.2%
|
|
| 2002 | 12 |
6.2%
|
|
| 2003 | 10 |
5.2%
|
|
| 2004 | 10 |
5.2%
|
|
| 2005 | 21 |
10.9%
|
|
| 2006 | 34 |
17.6%
|
|
| 2007 | 35 |
18.1%
|
|
| 2008 | 34 |
17.6%
|
|
| MISSING | 8 | ||
| NOT APPLICABLE | 185 |
