| Value | Category | Cases | |
|---|---|---|---|
| 1977 | 2 |
0%
|
|
| 1978 | 6 |
0%
|
|
| 1979 | 20 |
0%
|
|
| 1980 | 31 |
0.1%
|
|
| 1981 | 72 |
0.1%
|
|
| 1982 | 108 |
0.2%
|
|
| 1983 | 118 |
0.2%
|
|
| 1984 | 240 |
0.4%
|
|
| 1985 | 253 |
0.4%
|
|
| 1986 | 356 |
0.6%
|
|
| 1987 | 422 |
0.7%
|
|
| 1988 | 473 |
0.8%
|
|
| 1989 | 584 |
1%
|
|
| 1990 | 681 |
1.1%
|
|
| 1991 | 614 |
1%
|
|
| 1992 | 844 |
1.4%
|
|
| 1993 | 690 |
1.1%
|
|
| 1994 | 916 |
1.5%
|
|
| 1995 | 813 |
1.3%
|
|
| 1996 | 1037 |
1.7%
|
|
| 1997 | 864 |
1.4%
|
|
| 1998 | 1007 |
1.6%
|
|
| 1999 | 951 |
1.6%
|
|
| 2000 | 1110 |
1.8%
|
|
| 2001 | 1143 |
1.9%
|
|
| 2002 | 1214 |
2%
|
|
| 2003 | 1036 |
1.7%
|
|
| 2004 | 1282 |
2.1%
|
|
| 2005 | 1160 |
1.9%
|
|
| 2006 | 1409 |
2.3%
|
|
| 2007 | 1360 |
2.2%
|
|
| 2008 | 1375 |
2.2%
|
|
| 2009 | 1439 |
2.3%
|
|
| 2010 | 1416 |
2.3%
|
|
| 2011 | 1425 |
2.3%
|
|
| 2012 | 1382 |
2.3%
|
|
| 2013 | 1423 |
2.3%
|
|
| 2014 | 757 |
1.2%
|
|
| 9997 | Inconsistent | 88 |
0.1%
|
| 9998 | DK | 408 |
0.7%
|
| 9999 | Missing | 12 |
0%
|
| Sysmiss | 30745 |
50.2%
|