| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2000 or earlier | 1296 |
13.8%
|
| 2 | 2001 | 12 |
0.1%
|
| 3 | 2002 | 23 |
0.2%
|
| 4 | 2003 | 19 |
0.2%
|
| 5 | 2004 | 32 |
0.3%
|
| 6 | 2005 | 37 |
0.4%
|
| 7 | 2006 | 35 |
0.4%
|
| 8 | 2007 | 26 |
0.3%
|
| 9 | 2008 | 30 |
0.3%
|
| 10 | 2009 | 41 |
0.4%
|
| 11 | 2010 | 67 |
0.7%
|
| 12 | 2011 | 52 |
0.6%
|
| 13 | 2012 | 93 |
1%
|
| 14 | 2013 | 176 |
1.9%
|
| 15 | 2014 | 1056 |
11.2%
|
| 16 | 2015 | 6407 |
68.1%
|
| Sysmiss | 289 |