| Value | Category | Cases | |
|---|---|---|---|
| 1985 | 1 |
0.5%
|
|
| 1992 | 1 |
0.5%
|
|
| 1995 | 1 |
0.5%
|
|
| 1998 | 4 |
1.9%
|
|
| 1999 | 2 |
0.9%
|
|
| 2000 | 2 |
0.9%
|
|
| 2002 | 1 |
0.5%
|
|
| 2003 | 9 |
4.2%
|
|
| 2004 | 14 |
6.5%
|
|
| 2005 | 27 |
12.6%
|
|
| 2006 | 33 |
15.3%
|
|
| 2007 | 57 |
26.5%
|
|
| 2008 | 63 |
29.3%
|
|
| DON'T KNOW | 3 | ||
| MISSING | 6 | ||
| NOT APPLICABLE | 728 |
