| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1970 | 1 |
0.3%
|
| 2 | 1972 | 1 |
0.3%
|
| 3 | 1975 | 1 |
0.3%
|
| 4 | 1976 | 1 |
0.3%
|
| 5 | 1977 | 2 |
0.6%
|
| 6 | 1978 | 1 |
0.3%
|
| 7 | 1979 | 1 |
0.3%
|
| 8 | 1980 | 3 |
0.9%
|
| 9 | 1981 | 1 |
0.3%
|
| 10 | 1982 | 1 |
0.3%
|
| 11 | 1983 | 1 |
0.3%
|
| 12 | 1984 | 1 |
0.3%
|
| 13 | 1985 | 3 |
0.9%
|
| 14 | 1987 | 1 |
0.3%
|
| 15 | 1988 | 3 |
0.9%
|
| 16 | 1989 | 5 |
1.6%
|
| 17 | 1990 | 2 |
0.6%
|
| 18 | 1991 | 6 |
1.9%
|
| 19 | 1992 | 3 |
0.9%
|
| 20 | 1993 | 3 |
0.9%
|
| 21 | 1994 | 3 |
0.9%
|
| 22 | 1996 | 4 |
1.3%
|
| 23 | 1997 | 2 |
0.6%
|
| 24 | 1998 | 8 |
2.5%
|
| 25 | 1999 | 4 |
1.3%
|
| 26 | 2000 | 16 |
5%
|
| 27 | 2001 | 10 |
3.1%
|
| 28 | 2002 | 7 |
2.2%
|
| 29 | 2003 | 10 |
3.1%
|
| 30 | 2004 | 13 |
4.1%
|
| 31 | 2005 | 15 |
4.7%
|
| 32 | 2006 | 12 |
3.8%
|
| 33 | 2007 | 15 |
4.7%
|
| 34 | 2008 | 26 |
8.2%
|
| 35 | 2009 | 16 |
5%
|
| 36 | 2010 | 17 |
5.3%
|
| 37 | 2011 | 8 |
2.5%
|
| 38 | 2012 | 1 |
0.3%
|
| 39 | 2013 | 1 |
0.3%
|
| 40 | 2016 | 1 |
0.3%
|
| 41 | 2017 | 1 |
0.3%
|
| 42 | 2019 | 1 |
0.3%
|
| 43 | 2020 | 2 |
0.6%
|
| 44 | 2021 | 2 |
0.6%
|
| Missing value | 82 |
25.8%
|