| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 537 |
12.8%
|
|
| 2003 | 598 |
14.2%
|
|
| 2004 | 766 |
18.2%
|
|
| 2005 | 885 |
21.1%
|
|
| 2006 | 950 |
22.6%
|
|
| 2007 | 467 |
11.1%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK year | 0 |
0%
|