| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 2 |
0.8%
|
|
| 1999 | 2 |
0.8%
|
|
| 2000 | 4 |
1.7%
|
|
| 2001 | 3 |
1.2%
|
|
| 2002 | 1 |
0.4%
|
|
| 2003 | 3 |
1.2%
|
|
| 2004 | 3 |
1.2%
|
|
| 2005 | 7 |
2.9%
|
|
| 2006 | 10 |
4.1%
|
|
| 2007 | 15 |
6.2%
|
|
| 2008 | 15 |
6.2%
|
|
| 2009 | 23 |
9.5%
|
|
| 2010 | 35 |
14.5%
|
|
| 2011 | 68 |
28.1%
|
|
| 2012 | 47 |
19.4%
|
|
| 2013 | 2 |
0.8%
|
|
| 8888 | Don't Know | 0 |
0%
|
| 9999 | Missing | 2 |
0.8%
|
| Sysmiss | 647 |