| Value | Category | Cases | |
|---|---|---|---|
| 1992 | 2 |
0.3%
|
|
| 1994 | 3 |
0.5%
|
|
| 1995 | 5 |
0.8%
|
|
| 1996 | 5 |
0.8%
|
|
| 1997 | 5 |
0.8%
|
|
| 1998 | 11 |
1.7%
|
|
| 1999 | 12 |
1.9%
|
|
| 2000 | 12 |
1.9%
|
|
| 2001 | 12 |
1.9%
|
|
| 2002 | 17 |
2.7%
|
|
| 2003 | 25 |
3.9%
|
|
| 2004 | 27 |
4.2%
|
|
| 2005 | 30 |
4.7%
|
|
| 2006 | 37 |
5.8%
|
|
| 2007 | 35 |
5.5%
|
|
| 2008 | 42 |
6.6%
|
|
| 2009 | 50 |
7.8%
|
|
| 2010 | 60 |
9.4%
|
|
| 2011 | 60 |
9.4%
|
|
| 2012 | 75 |
11.7%
|
|
| 2013 | 115 |
18%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 7452 |