| Value | Category | Cases | |
|---|---|---|---|
| 1981 | 12 |
0.2%
|
|
| 1982 | 10 |
0.1%
|
|
| 1983 | 20 |
0.3%
|
|
| 1984 | 42 |
0.5%
|
|
| 1985 | 94 |
1.2%
|
|
| 1986 | 93 |
1.2%
|
|
| 1987 | 115 |
1.4%
|
|
| 1988 | 150 |
1.9%
|
|
| 1989 | 93 |
1.2%
|
|
| 1990 | 245 |
3.1%
|
|
| 1991 | 184 |
2.3%
|
|
| 1992 | 216 |
2.7%
|
|
| 1993 | 273 |
3.4%
|
|
| 1994 | 197 |
2.5%
|
|
| 1995 | 245 |
3.1%
|
|
| 1996 | 257 |
3.2%
|
|
| 1997 | 254 |
3.2%
|
|
| 1998 | 309 |
3.9%
|
|
| 1999 | 394 |
4.9%
|
|
| 2000 | 371 |
4.6%
|
|
| 2001 | 246 |
3.1%
|
|
| 2002 | 281 |
3.5%
|
|
| 2003 | 228 |
2.9%
|
|
| 2004 | 275 |
3.4%
|
|
| 2005 | 299 |
3.7%
|
|
| 2006 | 297 |
3.7%
|
|
| 2007 | 312 |
3.9%
|
|
| 2008 | 234 |
2.9%
|
|
| 2009 | 319 |
4%
|
|
| 2010 | 381 |
4.8%
|
|
| 2011 | 341 |
4.3%
|
|
| 2012 | 344 |
4.3%
|
|
| 2013 | 342 |
4.3%
|
|
| 2014 | 289 |
3.6%
|
|
| 2015 | 173 |
2.2%
|
|
| 2016 | 6 |
0.1%
|
|
| 9998 | don't know | 58 |
0.7%
|
| Sysmiss | 54594 |