| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2000 or earlier | 1630 |
15.1%
|
| 2 | 2001 | 26 |
0.2%
|
| 3 | 2002 | 33 |
0.3%
|
| 4 | 2003 | 34 |
0.3%
|
| 5 | 2004 | 40 |
0.4%
|
| 6 | 2005 | 59 |
0.5%
|
| 7 | 2006 | 60 |
0.6%
|
| 8 | 2007 | 46 |
0.4%
|
| 9 | 2008 | 43 |
0.4%
|
| 10 | 2009 | 56 |
0.5%
|
| 11 | 2010 | 92 |
0.9%
|
| 12 | 2011 | 83 |
0.8%
|
| 13 | 2012 | 176 |
1.6%
|
| 14 | 2013 | 670 |
6.2%
|
| 15 | 2014 | 7695 |
71.1%
|
| 16 | 2015 | 78 |
0.7%
|
| Sysmiss | 2 |