| Value | Category | Cases | |
|---|---|---|---|
| -997 | 1 |
0.4%
|
|
| 1970 | 1 |
0.4%
|
|
| 1971 | 1 |
0.4%
|
|
| 1973 | 1 |
0.4%
|
|
| 1983 | 1 |
0.4%
|
|
| 1985 | 1 |
0.4%
|
|
| 1986 | 1 |
0.4%
|
|
| 1987 | 4 |
1.4%
|
|
| 1988 | 3 |
1.1%
|
|
| 1989 | 4 |
1.4%
|
|
| 1990 | 9 |
3.2%
|
|
| 1991 | 4 |
1.4%
|
|
| 1992 | 5 |
1.8%
|
|
| 1993 | 11 |
3.9%
|
|
| 1994 | 6 |
2.1%
|
|
| 1995 | 3 |
1.1%
|
|
| 1996 | 5 |
1.8%
|
|
| 1997 | 5 |
1.8%
|
|
| 1998 | 5 |
1.8%
|
|
| 1999 | 2 |
0.7%
|
|
| 2000 | 6 |
2.1%
|
|
| 2001 | 6 |
2.1%
|
|
| 2002 | 8 |
2.9%
|
|
| 2003 | 3 |
1.1%
|
|
| 2004 | 2 |
0.7%
|
|
| 2005 | 6 |
2.1%
|
|
| 2006 | 2 |
0.7%
|
|
| 2007 | 8 |
2.9%
|
|
| 2008 | 13 |
4.6%
|
|
| 2009 | 9 |
3.2%
|
|
| 2010 | 18 |
6.4%
|
|
| 2011 | 25 |
8.9%
|
|
| 2012 | 30 |
10.7%
|
|
| 2013 | 10 |
3.6%
|
|
| 9997 | DO NOT KNOW | 61 |
21.8%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 2216 |