| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 32 |
3.6%
|
|
| 1997 | 5 |
0.6%
|
|
| 1998 | 8 |
0.9%
|
|
| 1999 | 14 |
1.6%
|
|
| 2001 | 1 |
0.1%
|
|
| 2002 | 1 |
0.1%
|
|
| 2004 | 3 |
0.3%
|
|
| 2005 | 1 |
0.1%
|
|
| 2007 | 1 |
0.1%
|
|
| 2008 | 1 |
0.1%
|
|
| 2009 | 3 |
0.3%
|
|
| 2012 | 1 |
0.1%
|
|
| 2014 | 5 |
0.6%
|
|
| 2015 | 228 |
26%
|
|
| 2016 | 93 |
10.6%
|
|
| 2017 | 40 |
4.6%
|
|
| 2019 | 2 |
0.2%
|
|
| Missing value | 438 |
49.9%
|