| Value | Category | Cases | |
|---|---|---|---|
| 1981 | 1 |
0%
|
|
| 1982 | 6 |
0.1%
|
|
| 1983 | 8 |
0.1%
|
|
| 1984 | 18 |
0.2%
|
|
| 1985 | 24 |
0.2%
|
|
| 1986 | 60 |
0.5%
|
|
| 1987 | 58 |
0.5%
|
|
| 1988 | 79 |
0.7%
|
|
| 1989 | 72 |
0.6%
|
|
| 1990 | 94 |
0.8%
|
|
| 1991 | 115 |
1%
|
|
| 1992 | 111 |
1%
|
|
| 1993 | 112 |
1%
|
|
| 1994 | 126 |
1.1%
|
|
| 1995 | 148 |
1.3%
|
|
| 1996 | 198 |
1.7%
|
|
| 1997 | 146 |
1.3%
|
|
| 1998 | 207 |
1.8%
|
|
| 1999 | 183 |
1.6%
|
|
| 2000 | 197 |
1.7%
|
|
| 2001 | 236 |
2.1%
|
|
| 2002 | 196 |
1.7%
|
|
| 2003 | 168 |
1.5%
|
|
| 2004 | 218 |
1.9%
|
|
| 2005 | 210 |
1.8%
|
|
| 2006 | 232 |
2%
|
|
| 2007 | 227 |
2%
|
|
| 2008 | 225 |
2%
|
|
| 2009 | 282 |
2.5%
|
|
| 2010 | 259 |
2.3%
|
|
| 2011 | 245 |
2.1%
|
|
| 2012 | 274 |
2.4%
|
|
| 2013 | 261 |
2.3%
|
|
| 2014 | 310 |
2.7%
|
|
| 2015 | 281 |
2.5%
|
|
| 2016 | 247 |
2.2%
|
|
| 2017 | 3 |
0%
|
|
| 9997 | Inconsistent | 10 |
0.1%
|
| 9998 | DK | 533 |
4.7%
|
| 9999 | Missing | 3 |
0%
|
| Sysmiss | 5069 |
44.3%
|