| Value | Category | Cases | |
|---|---|---|---|
| 1987 | 3 |
0%
|
|
| 1988 | 14 |
0.2%
|
|
| 1989 | 21 |
0.3%
|
|
| 1990 | 33 |
0.5%
|
|
| 1991 | 50 |
0.8%
|
|
| 1992 | 34 |
0.5%
|
|
| 1993 | 68 |
1%
|
|
| 1994 | 80 |
1.2%
|
|
| 1995 | 90 |
1.4%
|
|
| 1996 | 100 |
1.5%
|
|
| 1997 | 92 |
1.4%
|
|
| 1998 | 114 |
1.8%
|
|
| 1999 | 110 |
1.7%
|
|
| 2000 | 127 |
2%
|
|
| 2001 | 120 |
1.9%
|
|
| 2002 | 154 |
2.4%
|
|
| 2003 | 100 |
1.5%
|
|
| 2004 | 101 |
1.6%
|
|
| 2005 | 111 |
1.7%
|
|
| 2006 | 109 |
1.7%
|
|
| 2007 | 102 |
1.6%
|
|
| 2008 | 117 |
1.8%
|
|
| 2009 | 119 |
1.8%
|
|
| 2010 | 116 |
1.8%
|
|
| 2011 | 111 |
1.7%
|
|
| 2012 | 120 |
1.9%
|
|
| 2013 | 126 |
1.9%
|
|
| 2014 | 118 |
1.8%
|
|
| 2015 | 98 |
1.5%
|
|
| 2016 | 97 |
1.5%
|
|
| 2017 | 93 |
1.4%
|
|
| 2018 | 105 |
1.6%
|
|
| 2019 | 116 |
1.8%
|
|
| 2020 | 2 |
0%
|
|
| 9997 | INCONSISTENT | 1 |
0%
|
| 9999 | NO RESPONSE | 2 |
0%
|
| Sysmiss | 3409 |
52.6%
|