| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 1 |
1%
|
|
| 1981 | 1 |
1%
|
|
| 1986 | 1 |
1%
|
|
| 1991 | 1 |
1%
|
|
| 1992 | 1 |
1%
|
|
| 2003 | 1 |
1%
|
|
| 2007 | 1 |
1%
|
|
| 2008 | 3 |
3%
|
|
| 2010 | 2 |
2%
|
|
| 2011 | 1 |
1%
|
|
| 2014 | 2 |
2%
|
|
| 2015 | 4 |
4%
|
|
| 2016 | 5 |
5%
|
|
| 2017 | 5 |
5%
|
|
| 2018 | 4 |
4%
|
|
| 2019 | 16 |
16%
|
|
| 2020 | 18 |
18%
|
|
| 2021 | 33 |
33%
|
|
| 9999 | 9999.MISSING | 0 |
0%
|
| Sysmiss | 3374 |