| Value | Category | Cases | |
|---|---|---|---|
| 1970 | 2 |
0.6%
|
|
| 1975 | 1 |
0.3%
|
|
| 1976 | 1 |
0.3%
|
|
| 1980 | 5 |
1.5%
|
|
| 1982 | 1 |
0.3%
|
|
| 1985 | 4 |
1.2%
|
|
| 1986 | 1 |
0.3%
|
|
| 1987 | 1 |
0.3%
|
|
| 1988 | 1 |
0.3%
|
|
| 1989 | 1 |
0.3%
|
|
| 1990 | 5 |
1.5%
|
|
| 1992 | 12 |
3.6%
|
|
| 1993 | 4 |
1.2%
|
|
| 1994 | 7 |
2.1%
|
|
| 1995 | 5 |
1.5%
|
|
| 1996 | 3 |
0.9%
|
|
| 1997 | 21 |
6.4%
|
|
| 1998 | 6 |
1.8%
|
|
| 1999 | 3 |
0.9%
|
|
| 2000 | 26 |
7.9%
|
|
| 2001 | 4 |
1.2%
|
|
| 2002 | 12 |
3.6%
|
|
| 2003 | 4 |
1.2%
|
|
| 2004 | 8 |
2.4%
|
|
| 2005 | 12 |
3.6%
|
|
| 2006 | 12 |
3.6%
|
|
| 2007 | 25 |
7.6%
|
|
| 2008 | 28 |
8.5%
|
|
| 2009 | 25 |
7.6%
|
|
| 2010 | 46 |
14%
|
|
| 2011 | 28 |
8.5%
|
|
| 2012 | 14 |
4.3%
|
|
| 9999 | 1 |
0.3%
|
|
| Sysmiss | 348 |