| Value | Category | Cases | |
|---|---|---|---|
| 99 | ND | 0 |
0%
|
| 1990 | 2 |
0.2%
|
|
| 1996 | 1 |
0.1%
|
|
| 1998 | 2 |
0.2%
|
|
| 1999 | 2 |
0.2%
|
|
| 2001 | 2 |
0.2%
|
|
| 2002 | 1 |
0.1%
|
|
| 2003 | 3 |
0.3%
|
|
| 2004 | 1 |
0.1%
|
|
| 2005 | 5 |
0.6%
|
|
| 2006 | 2 |
0.2%
|
|
| 2007 | 10 |
1.1%
|
|
| 2008 | 17 |
1.9%
|
|
| 2009 | 23 |
2.6%
|
|
| 2010 | 51 |
5.8%
|
|
| 2011 | 93 |
10.5%
|
|
| 2012 | 244 |
27.7%
|
|
| 2013 | 423 |
48%
|
|
| Sysmiss | 618 |