| Value | Category | Cases | |
|---|---|---|---|
| 1973 | 1 |
0%
|
|
| 1983 | 1 |
0%
|
|
| 1984 | 2 |
0.1%
|
|
| 1985 | 1 |
0%
|
|
| 1986 | 2 |
0.1%
|
|
| 1987 | 1 |
0%
|
|
| 1988 | 2 |
0.1%
|
|
| 1989 | 5 |
0.2%
|
|
| 1990 | 10 |
0.3%
|
|
| 1991 | 21 |
0.6%
|
|
| 1992 | 32 |
1%
|
|
| 1993 | 43 |
1.3%
|
|
| 1994 | 69 |
2.1%
|
|
| 1995 | 139 |
4.2%
|
|
| 1996 | 184 |
5.6%
|
|
| 1997 | 256 |
7.8%
|
|
| 1998 | 339 |
10.3%
|
|
| 1999 | 367 |
11.1%
|
|
| 2000 | 426 |
12.9%
|
|
| 2001 | 350 |
10.6%
|
|
| 2002 | 322 |
9.7%
|
|
| 2003 | 234 |
7.1%
|
|
| 2004 | 133 |
4%
|
|
| 2005 | 49 |
1.5%
|
|
| 2006 | 19 |
0.6%
|
|
| 2007 | 5 |
0.2%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know year | 290 |
8.8%
|
| 9999 | 11 | ||
| Sysmiss | 5481 |