| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 |
0.1%
|
|
| 1992 | 1 |
0.1%
|
|
| 1993 | 1 |
0.1%
|
|
| 1996 | 1 |
0.1%
|
|
| 1999 | 1 |
0.1%
|
|
| 2000 | 1 |
0.1%
|
|
| 2002 | 2 |
0.2%
|
|
| 2003 | 5 |
0.6%
|
|
| 2004 | 4 |
0.5%
|
|
| 2005 | 4 |
0.5%
|
|
| 2006 | 11 |
1.3%
|
|
| 2007 | 9 |
1.1%
|
|
| 2008 | 16 |
1.9%
|
|
| 2009 | 37 |
4.3%
|
|
| 2010 | 57 |
6.7%
|
|
| 2011 | 105 |
12.3%
|
|
| 2012 | 231 |
27%
|
|
| 2013 | 289 |
33.8%
|
|
| 2014 | 64 |
7.5%
|
|
| 2015 | 16 |
1.9%
|
|
| Sysmiss | 235 |