| Value | Category | Cases | |
|---|---|---|---|
| 1983 | 2 |
2.7%
|
|
| 1985 | 1 |
1.4%
|
|
| 1986 | 1 |
1.4%
|
|
| 1990 | 3 |
4.1%
|
|
| 1994 | 2 |
2.7%
|
|
| 1995 | 2 |
2.7%
|
|
| 1997 | 3 |
4.1%
|
|
| 1998 | 2 |
2.7%
|
|
| 2000 | 4 |
5.4%
|
|
| 2001 | 2 |
2.7%
|
|
| 2004 | 3 |
4.1%
|
|
| 2006 | 3 |
4.1%
|
|
| 2007 | 3 |
4.1%
|
|
| 2008 | 3 |
4.1%
|
|
| 2009 | 3 |
4.1%
|
|
| 2010 | 6 |
8.1%
|
|
| 2011 | 7 |
9.5%
|
|
| 2012 | 11 |
14.9%
|
|
| 2013 | 6 |
8.1%
|
|
| 9997 | DO NOT KNOW | 7 |
9.5%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 2422 |