| Value | Category | Cases | |
|---|---|---|---|
| 1972 | 1 |
0.3%
|
|
| 1978 | 1 |
0.3%
|
|
| 1983 | 1 |
0.3%
|
|
| 1984 | 2 |
0.6%
|
|
| 1988 | 1 |
0.3%
|
|
| 1989 | 2 |
0.6%
|
|
| 1990 | 4 |
1.1%
|
|
| 1991 | 1 |
0.3%
|
|
| 1992 | 1 |
0.3%
|
|
| 1994 | 2 |
0.6%
|
|
| 1995 | 2 |
0.6%
|
|
| 1996 | 1 |
0.3%
|
|
| 1997 | 1 |
0.3%
|
|
| 1998 | 1 |
0.3%
|
|
| 1999 | 1 |
0.3%
|
|
| 2000 | 8 |
2.3%
|
|
| 2001 | 6 |
1.7%
|
|
| 2002 | 3 |
0.9%
|
|
| 2003 | 3 |
0.9%
|
|
| 2004 | 3 |
0.9%
|
|
| 2005 | 5 |
1.4%
|
|
| 2008 | 1 |
0.3%
|
|
| 2009 | 1 |
0.3%
|
|
| 2010 | 9 |
2.6%
|
|
| 2011 | 10 |
2.8%
|
|
| 2012 | 3 |
0.9%
|
|
| 2013 | 5 |
1.4%
|
|
| 2014 | 4 |
1.1%
|
|
| 2015 | 10 |
2.8%
|
|
| 2016 | 17 |
4.8%
|
|
| 2017 | 13 |
3.7%
|
|
| 2018 | 25 |
7.1%
|
|
| 2019 | 29 |
8.2%
|
|
| 2020 | 38 |
10.8%
|
|
| 2021 | 136 |
38.6%
|
|
| 9999 | 9999.MISSING | 1 |
0.3%
|
| Sysmiss | 3122 |