| Value | Category | Cases | |
|---|---|---|---|
| 1955 | 3 |
0.9%
|
|
| 1970 | 1 |
0.3%
|
|
| 1978 | 1 |
0.3%
|
|
| 1980 | 5 |
1.5%
|
|
| 1983 | 3 |
0.9%
|
|
| 1984 | 1 |
0.3%
|
|
| 1985 | 2 |
0.6%
|
|
| 1986 | 1 |
0.3%
|
|
| 1987 | 3 |
0.9%
|
|
| 1988 | 5 |
1.5%
|
|
| 1989 | 1 |
0.3%
|
|
| 1990 | 10 |
3%
|
|
| 1991 | 3 |
0.9%
|
|
| 1992 | 8 |
2.4%
|
|
| 1993 | 7 |
2.1%
|
|
| 1994 | 13 |
4%
|
|
| 1995 | 3 |
0.9%
|
|
| 1996 | 13 |
4%
|
|
| 1997 | 7 |
2.1%
|
|
| 1998 | 35 |
10.7%
|
|
| 1999 | 5 |
1.5%
|
|
| 2000 | 24 |
7.3%
|
|
| 2001 | 5 |
1.5%
|
|
| 2002 | 8 |
2.4%
|
|
| 2003 | 16 |
4.9%
|
|
| 2004 | 18 |
5.5%
|
|
| 2005 | 26 |
7.9%
|
|
| 2006 | 32 |
9.8%
|
|
| 2007 | 30 |
9.1%
|
|
| 2008 | 37 |
11.3%
|
|
| 9999 | 2 |
0.6%
|
|
| Sysmiss | 332 |