| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 13 |
24.1%
|
| 1874 | 1 |
1.9%
|
|
| 1960 | 1 |
1.9%
|
|
| 1974 | 1 |
1.9%
|
|
| 1975 | 1 |
1.9%
|
|
| 1984 | 1 |
1.9%
|
|
| 1986 | 1 |
1.9%
|
|
| 1996 | 1 |
1.9%
|
|
| 1998 | 1 |
1.9%
|
|
| 1999 | 1 |
1.9%
|
|
| 2001 | 2 |
3.7%
|
|
| 2002 | 2 |
3.7%
|
|
| 2003 | 1 |
1.9%
|
|
| 2005 | 2 |
3.7%
|
|
| 2006 | 1 |
1.9%
|
|
| 2007 | 2 |
3.7%
|
|
| 2008 | 1 |
1.9%
|
|
| 2009 | 2 |
3.7%
|
|
| 2010 | 1 |
1.9%
|
|
| 2011 | 1 |
1.9%
|
|
| 2012 | 1 |
1.9%
|
|
| 2014 | 1 |
1.9%
|
|
| 2015 | 3 |
5.6%
|
|
| 2016 | 3 |
5.6%
|
|
| 2017 | 1 |
1.9%
|
|
| 2018 | 1 |
1.9%
|
|
| 2019 | 1 |
1.9%
|
|
| 2020 | 2 |
3.7%
|
|
| 2021 | 3 |
5.6%
|
|
| 2023 | 1 |
1.9%
|
|
| Sysmiss | 253 |