| Value | Category | Cases | |
|---|---|---|---|
| 1960 | 1 |
0.6%
|
|
| 1969 | 1 |
0.6%
|
|
| 1981 | 1 |
0.6%
|
|
| 1983 | 1 |
0.6%
|
|
| 1985 | 1 |
0.6%
|
|
| 1990 | 2 |
1.3%
|
|
| 1994 | 2 |
1.3%
|
|
| 1996 | 1 |
0.6%
|
|
| 1998 | 4 |
2.5%
|
|
| 1999 | 1 |
0.6%
|
|
| 2001 | 2 |
1.3%
|
|
| 2002 | 5 |
3.2%
|
|
| 2003 | 2 |
1.3%
|
|
| 2004 | 3 |
1.9%
|
|
| 2005 | 5 |
3.2%
|
|
| 2006 | 3 |
1.9%
|
|
| 2007 | 9 |
5.7%
|
|
| 2008 | 18 |
11.5%
|
|
| 2009 | 43 |
27.4%
|
|
| 2010 | 51 |
32.5%
|
|
| 2011 | 1 |
0.6%
|
|
| Sysmiss | 1406 |