| Value | Category | Cases | |
|---|---|---|---|
| 1979 | 2 |
0%
|
|
| 1980 | 18 |
0.1%
|
|
| 1981 | 7 |
0%
|
|
| 1982 | 13 |
0%
|
|
| 1983 | 33 |
0.1%
|
|
| 1984 | 27 |
0.1%
|
|
| 1985 | 84 |
0.3%
|
|
| 1986 | 79 |
0.3%
|
|
| 1987 | 67 |
0.2%
|
|
| 1988 | 187 |
0.6%
|
|
| 1989 | 125 |
0.4%
|
|
| 1990 | 331 |
1.1%
|
|
| 1991 | 178 |
0.6%
|
|
| 1992 | 263 |
0.8%
|
|
| 1993 | 276 |
0.9%
|
|
| 1994 | 275 |
0.9%
|
|
| 1995 | 354 |
1.1%
|
|
| 1996 | 418 |
1.3%
|
|
| 1997 | 369 |
1.2%
|
|
| 1998 | 632 |
2%
|
|
| 1999 | 525 |
1.7%
|
|
| 2000 | 766 |
2.5%
|
|
| 2001 | 450 |
1.4%
|
|
| 2002 | 540 |
1.7%
|
|
| 2003 | 582 |
1.9%
|
|
| 2004 | 572 |
1.8%
|
|
| 2005 | 645 |
2.1%
|
|
| 2006 | 704 |
2.3%
|
|
| 2007 | 718 |
2.3%
|
|
| 2008 | 969 |
3.1%
|
|
| 2009 | 748 |
2.4%
|
|
| 2010 | 1044 |
3.4%
|
|
| 2011 | 868 |
2.8%
|
|
| 2012 | 930 |
3%
|
|
| 2013 | 886 |
2.9%
|
|
| 2014 | 927 |
3%
|
|
| 2015 | 966 |
3.1%
|
|
| 2016 | 917 |
3%
|
|
| 2017 | 726 |
2.3%
|
|
| 2018 | 702 |
2.3%
|
|
| 2019 | 41 |
0.1%
|
|
| 9997 | Inconsistent | 331 |
1.1%
|
| 9998 | DK | 1528 |
4.9%
|
| 9999 | NO RESPONSE | 10 |
0%
|
| Sysmiss | 10210 |
32.9%
|