| Value | Category | Cases | |
|---|---|---|---|
| 1978 | 1 |
0%
|
|
| 1979 | 3 |
0%
|
|
| 1980 | 6 |
0%
|
|
| 1981 | 16 |
0.1%
|
|
| 1982 | 35 |
0.1%
|
|
| 1983 | 77 |
0.2%
|
|
| 1984 | 115 |
0.4%
|
|
| 1985 | 171 |
0.5%
|
|
| 1986 | 222 |
0.7%
|
|
| 1987 | 324 |
1%
|
|
| 1988 | 364 |
1.1%
|
|
| 1989 | 489 |
1.5%
|
|
| 1990 | 624 |
2%
|
|
| 1991 | 722 |
2.3%
|
|
| 1992 | 765 |
2.4%
|
|
| 1993 | 937 |
2.9%
|
|
| 1994 | 995 |
3.1%
|
|
| 1995 | 992 |
3.1%
|
|
| 1996 | 1057 |
3.3%
|
|
| 1997 | 1079 |
3.4%
|
|
| 1998 | 1100 |
3.5%
|
|
| 1999 | 1140 |
3.6%
|
|
| 2000 | 1264 |
4%
|
|
| 2001 | 1175 |
3.7%
|
|
| 2002 | 1303 |
4.1%
|
|
| 2003 | 1286 |
4%
|
|
| 2004 | 1398 |
4.4%
|
|
| 2005 | 1368 |
4.3%
|
|
| 2006 | 1497 |
4.7%
|
|
| 2007 | 1470 |
4.6%
|
|
| 2008 | 1490 |
4.7%
|
|
| 2009 | 1563 |
4.9%
|
|
| 2010 | 1671 |
5.3%
|
|
| 2011 | 1620 |
5.1%
|
|
| 2012 | 1548 |
4.9%
|
|
| 2013 | 1547 |
4.9%
|
|
| 2014 | 348 |
1.1%
|
|
| 9997 | Inconsistent | 16 |
0.1%
|
| 9999 | Missing | 19 |
0.1%
|