| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 3 |
0%
|
|
| 1981 | 5 |
0%
|
|
| 1982 | 4 |
0%
|
|
| 1983 | 8 |
0%
|
|
| 1984 | 17 |
0.1%
|
|
| 1985 | 17 |
0.1%
|
|
| 1986 | 25 |
0.1%
|
|
| 1987 | 36 |
0.2%
|
|
| 1988 | 82 |
0.4%
|
|
| 1989 | 142 |
0.6%
|
|
| 1990 | 184 |
0.8%
|
|
| 1991 | 144 |
0.7%
|
|
| 1992 | 182 |
0.8%
|
|
| 1993 | 182 |
0.8%
|
|
| 1994 | 300 |
1.4%
|
|
| 1995 | 235 |
1.1%
|
|
| 1996 | 271 |
1.2%
|
|
| 1997 | 321 |
1.5%
|
|
| 1998 | 399 |
1.8%
|
|
| 1999 | 652 |
3%
|
|
| 2000 | 678 |
3.1%
|
|
| 2001 | 660 |
3%
|
|
| 2002 | 626 |
2.9%
|
|
| 2003 | 632 |
2.9%
|
|
| 2004 | 776 |
3.5%
|
|
| 2005 | 862 |
3.9%
|
|
| 2006 | 717 |
3.3%
|
|
| 2007 | 949 |
4.3%
|
|
| 2008 | 831 |
3.8%
|
|
| 2009 | 1240 |
5.7%
|
|
| 2010 | 1094 |
5%
|
|
| 2011 | 1196 |
5.5%
|
|
| 2012 | 1283 |
5.9%
|
|
| 2013 | 1249 |
5.7%
|
|
| 2014 | 1357 |
6.2%
|
|
| 2015 | 1149 |
5.3%
|
|
| 2016 | 1022 |
4.7%
|
|
| 2017 | 970 |
4.4%
|
|
| 2018 | 759 |
3.5%
|
|
| 2019 | 436 |
2%
|
|
| 2020 | 21 |
0.1%
|
|
| 9997 | Inconsistent | 152 |
0.7%
|
| 9999 | NO RESPONSE | 3 |
0%
|
| Sysmiss | 15283 |