| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 112 |
2.2%
|
|
| 2006 | 736 |
14.7%
|
|
| 2007 | 908 |
18.1%
|
|
| 2008 | 1046 |
20.9%
|
|
| 2009 | 1205 |
24%
|
|
| 2010 | 989 |
19.7%
|
|
| 9997 | inconsistent | 15 |
0.3%
|
| 9998 | dk | 0 |
0%
|
| 10001 | .Z | 3221 |