| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 37 |
7.2%
|
|
| 2006 | 194 |
37.6%
|
|
| 2007 | 162 |
31.4%
|
|
| 2008 | 103 |
20%
|
|
| 2009 | 15 |
2.9%
|
|
| 2010 | 3 |
0.6%
|
|
| 9997 | inconsistent | 2 |
0.4%
|
| 9998 | dk | 0 |
0%
|
| 10001 | .Z | 18238 |