| Value | Category | Cases | |
|---|---|---|---|
| 1981 | 12 |
0.1%
|
|
| 1982 | 3 |
0%
|
|
| 1983 | 32 |
0.3%
|
|
| 1984 | 34 |
0.3%
|
|
| 1985 | 37 |
0.3%
|
|
| 1986 | 82 |
0.7%
|
|
| 1987 | 109 |
1%
|
|
| 1988 | 211 |
1.9%
|
|
| 1989 | 259 |
2.3%
|
|
| 1990 | 318 |
2.8%
|
|
| 1991 | 317 |
2.8%
|
|
| 1992 | 410 |
3.6%
|
|
| 1993 | 356 |
3.1%
|
|
| 1994 | 349 |
3.1%
|
|
| 1995 | 435 |
3.8%
|
|
| 1996 | 397 |
3.5%
|
|
| 1997 | 432 |
3.8%
|
|
| 1998 | 448 |
4%
|
|
| 1999 | 392 |
3.5%
|
|
| 2000 | 494 |
4.4%
|
|
| 2001 | 382 |
3.4%
|
|
| 2002 | 412 |
3.6%
|
|
| 2003 | 432 |
3.8%
|
|
| 2004 | 440 |
3.9%
|
|
| 2005 | 469 |
4.1%
|
|
| 2006 | 404 |
3.6%
|
|
| 2007 | 401 |
3.5%
|
|
| 2008 | 454 |
4%
|
|
| 2009 | 324 |
2.9%
|
|
| 2010 | 363 |
3.2%
|
|
| 2011 | 325 |
2.9%
|
|
| 2012 | 333 |
2.9%
|
|
| 2013 | 293 |
2.6%
|
|
| 2014 | 283 |
2.5%
|
|
| 2015 | 272 |
2.4%
|
|
| 2016 | 240 |
2.1%
|
|
| 2017 | 257 |
2.3%
|
|
| 2018 | 99 |
0.9%
|
|
| 9999 | NO RESPONSE | 3 |
0%
|