| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 6 |
0%
|
|
| 1981 | 6 |
0%
|
|
| 1982 | 25 |
0.1%
|
|
| 1983 | 41 |
0.1%
|
|
| 1984 | 68 |
0.2%
|
|
| 1985 | 91 |
0.2%
|
|
| 1986 | 135 |
0.3%
|
|
| 1987 | 181 |
0.4%
|
|
| 1988 | 269 |
0.6%
|
|
| 1989 | 355 |
0.8%
|
|
| 1990 | 491 |
1.1%
|
|
| 1991 | 526 |
1.2%
|
|
| 1992 | 701 |
1.6%
|
|
| 1993 | 716 |
1.7%
|
|
| 1994 | 775 |
1.8%
|
|
| 1995 | 964 |
2.2%
|
|
| 1996 | 963 |
2.2%
|
|
| 1997 | 1078 |
2.5%
|
|
| 1998 | 1186 |
2.8%
|
|
| 1999 | 1301 |
3%
|
|
| 2000 | 1395 |
3.2%
|
|
| 2001 | 1332 |
3.1%
|
|
| 2002 | 1375 |
3.2%
|
|
| 2003 | 1507 |
3.5%
|
|
| 2004 | 1548 |
3.6%
|
|
| 2005 | 1717 |
4%
|
|
| 2006 | 1701 |
4%
|
|
| 2007 | 1762 |
4.1%
|
|
| 2008 | 1835 |
4.3%
|
|
| 2009 | 1999 |
4.6%
|
|
| 2010 | 2258 |
5.2%
|
|
| 2011 | 1997 |
4.6%
|
|
| 2012 | 2115 |
4.9%
|
|
| 2013 | 2067 |
4.8%
|
|
| 2014 | 2061 |
4.8%
|
|
| 2015 | 2101 |
4.9%
|
|
| 2016 | 2067 |
4.8%
|
|
| 2017 | 2087 |
4.8%
|
|
| 2018 | 183 |
0.4%
|
|
| 9997 | Inconsistent | 20 |
0%
|
| 9999 | No response | 27 |
0.1%
|
| Sysmiss | 36478 |