| Value | Category | Cases | |
|---|---|---|---|
| 1974 | 1 |
0%
|
|
| 1977 | 1 |
0%
|
|
| 1978 | 2 |
0%
|
|
| 1979 | 3 |
0%
|
|
| 1980 | 6 |
0%
|
|
| 1981 | 3 |
0%
|
|
| 1982 | 10 |
0.1%
|
|
| 1983 | 10 |
0.1%
|
|
| 1984 | 17 |
0.1%
|
|
| 1985 | 16 |
0.1%
|
|
| 1986 | 23 |
0.2%
|
|
| 1987 | 19 |
0.2%
|
|
| 1988 | 34 |
0.3%
|
|
| 1989 | 37 |
0.3%
|
|
| 1990 | 32 |
0.3%
|
|
| 1991 | 55 |
0.4%
|
|
| 1992 | 58 |
0.5%
|
|
| 1993 | 70 |
0.6%
|
|
| 1994 | 89 |
0.7%
|
|
| 1995 | 103 |
0.8%
|
|
| 1996 | 131 |
1%
|
|
| 1997 | 141 |
1.1%
|
|
| 1998 | 149 |
1.2%
|
|
| 1999 | 197 |
1.6%
|
|
| 2000 | 255 |
2%
|
|
| 2001 | 283 |
2.3%
|
|
| 2002 | 337 |
2.7%
|
|
| 2003 | 416 |
3.3%
|
|
| 2004 | 597 |
4.8%
|
|
| 2005 | 759 |
6.1%
|
|
| 2006 | 967 |
7.7%
|
|
| 2007 | 1300 |
10.4%
|
|
| 2008 | 1444 |
11.6%
|
|
| 2009 | 521 |
4.2%
|
|
| 9997 | inconsistent | 5 |
0%
|
| 9999 | missing | 3 |
0%
|
| Sysmiss | 4394 |
35.2%
|