| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 155 |
9.1%
|
|
| 1997 | 59 |
3.5%
|
|
| 1998 | 16 |
0.9%
|
|
| 1999 | 23 |
1.3%
|
|
| 2000 | 24 |
1.4%
|
|
| 2001 | 7 |
0.4%
|
|
| 2002 | 8 |
0.5%
|
|
| 2003 | 1 |
0.1%
|
|
| 2004 | 19 |
1.1%
|
|
| 2006 | 7 |
0.4%
|
|
| 2007 | 7 |
0.4%
|
|
| 2008 | 1 |
0.1%
|
|
| 2009 | 3 |
0.2%
|
|
| 2010 | 3 |
0.2%
|
|
| 2013 | 3 |
0.2%
|
|
| 2014 | 24 |
1.4%
|
|
| 2015 | 604 |
35.4%
|
|
| 2016 | 141 |
8.3%
|
|
| 2017 | 71 |
4.2%
|
|
| 2018 | 5 |
0.3%
|
|
| Missing value | 523 |
30.7%
|