| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 1 |
3.2%
|
|
| 1998 | 1 |
3.2%
|
|
| 1999 | 1 |
3.2%
|
|
| 2000 | 3 |
9.7%
|
|
| 2002 | 2 |
6.5%
|
|
| 2003 | 2 |
6.5%
|
|
| 2004 | 2 |
6.5%
|
|
| 2006 | 3 |
9.7%
|
|
| 2007 | 3 |
9.7%
|
|
| 2008 | 3 |
9.7%
|
|
| 2009 | 4 |
12.9%
|
|
| 2010 | 6 |
19.4%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 181 |