| Value | Category | Cases | |
|---|---|---|---|
| 1973 | 1 |
0%
|
|
| 1975 | 1 |
0%
|
|
| 1976 | 4 |
0%
|
|
| 1977 | 10 |
0%
|
|
| 1978 | 21 |
0.1%
|
|
| 1979 | 18 |
0.1%
|
|
| 1980 | 56 |
0.2%
|
|
| 1981 | 44 |
0.1%
|
|
| 1982 | 83 |
0.3%
|
|
| 1983 | 105 |
0.4%
|
|
| 1984 | 149 |
0.5%
|
|
| 1985 | 138 |
0.5%
|
|
| 1986 | 152 |
0.5%
|
|
| 1987 | 158 |
0.5%
|
|
| 1988 | 219 |
0.7%
|
|
| 1989 | 177 |
0.6%
|
|
| 1990 | 270 |
0.9%
|
|
| 1991 | 252 |
0.8%
|
|
| 1992 | 292 |
1%
|
|
| 1993 | 276 |
0.9%
|
|
| 1994 | 331 |
1.1%
|
|
| 1995 | 336 |
1.1%
|
|
| 1996 | 320 |
1.1%
|
|
| 1997 | 324 |
1.1%
|
|
| 1998 | 415 |
1.4%
|
|
| 1999 | 405 |
1.4%
|
|
| 2000 | 555 |
1.9%
|
|
| 2001 | 442 |
1.5%
|
|
| 2002 | 508 |
1.7%
|
|
| 2003 | 503 |
1.7%
|
|
| 2004 | 602 |
2%
|
|
| 2005 | 583 |
1.9%
|
|
| 2006 | 626 |
2.1%
|
|
| 2007 | 647 |
2.2%
|
|
| 2008 | 730 |
2.4%
|
|
| 2009 | 725 |
2.4%
|
|
| 2010 | 793 |
2.7%
|
|
| 2011 | 715 |
2.4%
|
|
| 2012 | 695 |
2.3%
|
|
| 2013 | 866 |
2.9%
|
|
| 2014 | 380 |
1.3%
|
|
| 9997 | Inconsistent | 47 |
0.2%
|
| 9998 | DK | 4415 |
14.8%
|
| 9999 | Missing | 48 |
0.2%
|
| Sysmiss | 11461 |
38.3%
|