| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
0.2%
|
| 1978 | 1 |
0%
|
|
| 1979 | 1 |
0%
|
|
| 1983 | 1 |
0%
|
|
| 1984 | 1 |
0%
|
|
| 1985 | 2 |
0.1%
|
|
| 1988 | 2 |
0.1%
|
|
| 1990 | 1 |
0%
|
|
| 1991 | 1 |
0%
|
|
| 1993 | 12 |
0.5%
|
|
| 1994 | 4 |
0.2%
|
|
| 1995 | 3 |
0.1%
|
|
| 1996 | 1 |
0%
|
|
| 1997 | 2 |
0.1%
|
|
| 1998 | 10 |
0.4%
|
|
| 1999 | 8 |
0.3%
|
|
| 2000 | 1 |
0%
|
|
| 2001 | 4 |
0.2%
|
|
| 2002 | 7 |
0.3%
|
|
| 2003 | 64 |
2.5%
|
|
| 2004 | 16 |
0.6%
|
|
| 2005 | 4 |
0.2%
|
|
| 2006 | 10 |
0.4%
|
|
| 2007 | 7 |
0.3%
|
|
| 2008 | 36 |
1.4%
|
|
| 2009 | 24 |
0.9%
|
|
| 2010 | 9 |
0.4%
|
|
| 2011 | 21 |
0.8%
|
|
| 2012 | 23 |
0.9%
|
|
| 2013 | 130 |
5.1%
|
|
| 2014 | 48 |
1.9%
|
|
| 2015 | 46 |
1.8%
|
|
| 2016 | 59 |
2.3%
|
|
| 2017 | 69 |
2.7%
|
|
| 2018 | 198 |
7.8%
|
|
| 2019 | 142 |
5.6%
|
|
| 2020 | 121 |
4.8%
|
|
| 2021 | 221 |
8.7%
|
|
| 2022 | 288 |
11.4%
|
|
| 2023 | 570 |
22.5%
|
|
| 2024 | 362 |
14.3%
|