| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1998 | 1 |
0.9%
|
| 2 | 1999 | 0 |
0%
|
| 3 | 2000 | 0 |
0%
|
| 4 | 2001 | 0 |
0%
|
| 5 | 2002 | 3 |
2.6%
|
| 6 | 2003 | 1 |
0.9%
|
| 7 | 2004 | 0 |
0%
|
| 8 | 2005 | 2 |
1.7%
|
| 9 | 2006 | 2 |
1.7%
|
| 10 | 2007 | 3 |
2.6%
|
| 11 | 2008 | 5 |
4.3%
|
| 12 | 2009 | 4 |
3.5%
|
| 13 | 2010 | 5 |
4.3%
|
| 14 | 2011 | 1 |
0.9%
|
| 15 | 2012 | 4 |
3.5%
|
| 16 | 2013 | 6 |
5.2%
|
| 17 | 2014 | 9 |
7.8%
|
| 18 | 2015 | 4 |
3.5%
|
| 19 | 2016 | 11 |
9.6%
|
| 20 | 2017 | 29 |
25.2%
|
| 21 | 2018 | 18 |
15.7%
|
| 22 | 2019 | 0 |
0%
|
| 9997 | Currently on IPT | 0 |
0%
|
| 9999 | Don't know | 7 |
6.1%
|
| Sysmiss | 1883 |