| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 3 |
0%
|
|
| 1981 | 3 |
0%
|
|
| 1982 | 9 |
0%
|
|
| 1983 | 12 |
0.1%
|
|
| 1984 | 15 |
0.1%
|
|
| 1985 | 37 |
0.2%
|
|
| 1986 | 66 |
0.4%
|
|
| 1987 | 98 |
0.5%
|
|
| 1988 | 127 |
0.7%
|
|
| 1989 | 136 |
0.7%
|
|
| 1990 | 226 |
1.2%
|
|
| 1991 | 144 |
0.8%
|
|
| 1992 | 208 |
1.1%
|
|
| 1993 | 209 |
1.1%
|
|
| 1994 | 225 |
1.2%
|
|
| 1995 | 281 |
1.5%
|
|
| 1996 | 327 |
1.7%
|
|
| 1997 | 356 |
1.9%
|
|
| 1998 | 451 |
2.4%
|
|
| 1999 | 433 |
2.3%
|
|
| 2000 | 581 |
3.1%
|
|
| 2001 | 318 |
1.7%
|
|
| 2002 | 415 |
2.2%
|
|
| 2003 | 417 |
2.2%
|
|
| 2004 | 372 |
2%
|
|
| 2005 | 400 |
2.1%
|
|
| 2006 | 376 |
2%
|
|
| 2007 | 411 |
2.2%
|
|
| 2008 | 489 |
2.6%
|
|
| 2009 | 461 |
2.5%
|
|
| 2010 | 544 |
2.9%
|
|
| 2011 | 529 |
2.8%
|
|
| 2012 | 580 |
3.1%
|
|
| 2013 | 601 |
3.2%
|
|
| 2014 | 642 |
3.4%
|
|
| 2015 | 682 |
3.6%
|
|
| 2016 | 682 |
3.6%
|
|
| 2017 | 624 |
3.3%
|
|
| 2018 | 334 |
1.8%
|
|
| 9997 | INCOHERENT | 96 |
0.5%
|
| 9998 | NSP | 261 |
1.4%
|
| 9999 | NON REPONSE | 5 |
0%
|
| Sysmiss | 5626 |
29.9%
|