| Value | Category | Cases | |
|---|---|---|---|
| 999 | 2 |
0%
|
|
| 1980 | 1 |
0%
|
|
| 1983 | 1 |
0%
|
|
| 1987 | 1 |
0%
|
|
| 1990 | 1 |
0%
|
|
| 1991 | 2 |
0%
|
|
| 1995 | 1 |
0%
|
|
| 1997 | 1 |
0%
|
|
| 1998 | 1 |
0%
|
|
| 1999 | 2 |
0%
|
|
| 2000 | 4 |
0.1%
|
|
| 2001 | 1 |
0%
|
|
| 2002 | 2 |
0%
|
|
| 2003 | 3 |
0.1%
|
|
| 2004 | 1 |
0%
|
|
| 2005 | 3 |
0.1%
|
|
| 2006 | 3 |
0.1%
|
|
| 2007 | 3 |
0.1%
|
|
| 2008 | 9 |
0.2%
|
|
| 2009 | 9 |
0.2%
|
|
| 2010 | 14 |
0.3%
|
|
| 2011 | 14 |
0.3%
|
|
| 2012 | 31 |
0.7%
|
|
| 2013 | 106 |
2.5%
|
|
| 2014 | 376 |
9%
|
|
| 2015 | 159 |
3.8%
|
|
| 9999 | missing date | 3443 |
82.1%
|
| Sysmiss | 6 |