| Value | Category | Cases | |
|---|---|---|---|
| 1985 | 1 |
0.2%
|
|
| 1986 | 1 |
0.2%
|
|
| 1987 | 4 |
0.8%
|
|
| 1988 | 8 |
1.6%
|
|
| 1990 | 6 |
1.2%
|
|
| 1991 | 6 |
1.2%
|
|
| 1992 | 7 |
1.4%
|
|
| 1993 | 4 |
0.8%
|
|
| 1994 | 7 |
1.4%
|
|
| 1995 | 6 |
1.2%
|
|
| 1996 | 14 |
2.9%
|
|
| 1997 | 15 |
3.1%
|
|
| 1998 | 21 |
4.3%
|
|
| 1999 | 25 |
5.1%
|
|
| 2000 | 16 |
3.3%
|
|
| 2001 | 31 |
6.4%
|
|
| 2002 | 18 |
3.7%
|
|
| 2003 | 37 |
7.6%
|
|
| 2004 | 47 |
9.6%
|
|
| 2005 | 46 |
9.4%
|
|
| 2006 | 50 |
10.2%
|
|
| 2007 | 50 |
10.2%
|
|
| 2008 | 68 |
13.9%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 20476 |