| Value | Category | Cases | |
|---|---|---|---|
| 1988 | 1 |
0.1%
|
|
| 1989 | 4 |
0.4%
|
|
| 1990 | 1 |
0.1%
|
|
| 1991 | 4 |
0.4%
|
|
| 1992 | 8 |
0.8%
|
|
| 1993 | 7 |
0.7%
|
|
| 1994 | 14 |
1.4%
|
|
| 1995 | 16 |
1.6%
|
|
| 1996 | 15 |
1.5%
|
|
| 1997 | 25 |
2.5%
|
|
| 1998 | 33 |
3.4%
|
|
| 1999 | 31 |
3.1%
|
|
| 2000 | 30 |
3%
|
|
| 2001 | 28 |
2.8%
|
|
| 2002 | 35 |
3.6%
|
|
| 2003 | 46 |
4.7%
|
|
| 2004 | 49 |
5%
|
|
| 2005 | 54 |
5.5%
|
|
| 2006 | 58 |
5.9%
|
|
| 2007 | 55 |
5.6%
|
|
| 2008 | 63 |
6.4%
|
|
| 2009 | 71 |
7.2%
|
|
| 2010 | 70 |
7.1%
|
|
| 2011 | 61 |
6.2%
|
|
| 2012 | 84 |
8.5%
|
|
| 2013 | 122 |
12.4%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 13649 |