| Value | Category | Cases | |
|---|---|---|---|
| 1974 | 1 |
0%
|
|
| 1975 | 2 |
0%
|
|
| 1976 | 5 |
0%
|
|
| 1977 | 11 |
0%
|
|
| 1978 | 15 |
0%
|
|
| 1979 | 37 |
0.1%
|
|
| 1980 | 69 |
0.2%
|
|
| 1981 | 114 |
0.4%
|
|
| 1982 | 128 |
0.4%
|
|
| 1983 | 241 |
0.8%
|
|
| 1984 | 252 |
0.8%
|
|
| 1985 | 348 |
1.1%
|
|
| 1986 | 420 |
1.3%
|
|
| 1987 | 413 |
1.3%
|
|
| 1988 | 494 |
1.6%
|
|
| 1989 | 612 |
2%
|
|
| 1990 | 683 |
2.2%
|
|
| 1991 | 782 |
2.5%
|
|
| 1992 | 776 |
2.5%
|
|
| 1993 | 939 |
3%
|
|
| 1994 | 990 |
3.2%
|
|
| 1995 | 1007 |
3.2%
|
|
| 1996 | 1074 |
3.4%
|
|
| 1997 | 1162 |
3.7%
|
|
| 1998 | 1301 |
4.2%
|
|
| 1999 | 1319 |
4.2%
|
|
| 2000 | 1459 |
4.7%
|
|
| 2001 | 1381 |
4.4%
|
|
| 2002 | 1402 |
4.5%
|
|
| 2003 | 1517 |
4.9%
|
|
| 2004 | 1578 |
5.1%
|
|
| 2005 | 1545 |
5%
|
|
| 2006 | 1605 |
5.2%
|
|
| 2007 | 1492 |
4.8%
|
|
| 2008 | 1594 |
5.1%
|
|
| 2009 | 1530 |
4.9%
|
|
| 2010 | 1472 |
4.7%
|
|
| 2011 | 1309 |
4.2%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 62 |
0.2%
|
| 9999 | Missing | 4 |
0%
|