| Value | Category | Cases | |
|---|---|---|---|
| 0 | 14 |
6%
|
|
| 77 | 1 |
0.4%
|
|
| 1978 | 1 |
0.4%
|
|
| 1980 | 1 |
0.4%
|
|
| 1982 | 1 |
0.4%
|
|
| 1983 | 1 |
0.4%
|
|
| 1984 | 1 |
0.4%
|
|
| 1985 | 3 |
1.3%
|
|
| 1986 | 2 |
0.9%
|
|
| 1987 | 2 |
0.9%
|
|
| 1989 | 1 |
0.4%
|
|
| 1990 | 3 |
1.3%
|
|
| 1992 | 2 |
0.9%
|
|
| 1993 | 1 |
0.4%
|
|
| 1994 | 1 |
0.4%
|
|
| 1996 | 4 |
1.7%
|
|
| 1998 | 8 |
3.4%
|
|
| 1999 | 1 |
0.4%
|
|
| 2000 | 2 |
0.9%
|
|
| 2001 | 3 |
1.3%
|
|
| 2002 | 3 |
1.3%
|
|
| 2003 | 2 |
0.9%
|
|
| 2004 | 8 |
3.4%
|
|
| 2005 | 6 |
2.6%
|
|
| 2006 | 9 |
3.9%
|
|
| 2007 | 14 |
6%
|
|
| 2008 | 11 |
4.7%
|
|
| 2009 | 15 |
6.4%
|
|
| 2010 | 18 |
7.7%
|
|
| 2011 | 27 |
11.6%
|
|
| 2012 | 10 |
4.3%
|
|
| 2013 | 57 |
24.5%
|
|
| Sysmiss | 667 |