| Value | Category | Cases | |
|---|---|---|---|
| 1971 | 134 |
0.8%
|
|
| 1972 | 327 |
1.9%
|
|
| 1973 | 382 |
2.2%
|
|
| 1974 | 400 |
2.3%
|
|
| 1975 | 412 |
2.3%
|
|
| 1976 | 406 |
2.3%
|
|
| 1977 | 420 |
2.4%
|
|
| 1978 | 391 |
2.2%
|
|
| 1979 | 452 |
2.6%
|
|
| 1980 | 453 |
2.6%
|
|
| 1981 | 486 |
2.8%
|
|
| 1982 | 481 |
2.7%
|
|
| 1983 | 544 |
3.1%
|
|
| 1984 | 502 |
2.9%
|
|
| 1985 | 539 |
3.1%
|
|
| 1986 | 615 |
3.5%
|
|
| 1987 | 591 |
3.4%
|
|
| 1988 | 580 |
3.3%
|
|
| 1989 | 578 |
3.3%
|
|
| 1990 | 609 |
3.5%
|
|
| 1991 | 612 |
3.5%
|
|
| 1992 | 616 |
3.5%
|
|
| 1993 | 603 |
3.4%
|
|
| 1994 | 563 |
3.2%
|
|
| 1995 | 617 |
3.5%
|
|
| 1996 | 557 |
3.2%
|
|
| 1997 | 522 |
3%
|
|
| 1998 | 519 |
2.9%
|
|
| 1999 | 494 |
2.8%
|
|
| 2000 | 472 |
2.7%
|
|
| 2001 | 420 |
2.4%
|
|
| 2002 | 480 |
2.7%
|
|
| 2003 | 475 |
2.7%
|
|
| 2004 | 547 |
3.1%
|
|
| 2005 | 555 |
3.2%
|
|
| 2006 | 255 |
1.4%
|
|
| 2007 | 1 |
0%
|
|
| 9998 | DK | 0 |
0%
|
| 9999 | NO RESPONSE | 0 |
0%
|
| Sysmiss | 393 |