| Value | Category | Cases | |
|---|---|---|---|
| 1964 | 1 |
0.4%
|
|
| 1965 | 1 |
0.4%
|
|
| 1968 | 1 |
0.4%
|
|
| 1972 | 1 |
0.4%
|
|
| 1973 | 1 |
0.4%
|
|
| 1975 | 1 |
0.4%
|
|
| 1976 | 2 |
0.7%
|
|
| 1977 | 1 |
0.4%
|
|
| 1979 | 2 |
0.7%
|
|
| 1980 | 2 |
0.7%
|
|
| 1981 | 1 |
0.4%
|
|
| 1985 | 5 |
1.8%
|
|
| 1986 | 5 |
1.8%
|
|
| 1987 | 4 |
1.4%
|
|
| 1988 | 1 |
0.4%
|
|
| 1989 | 3 |
1.1%
|
|
| 1990 | 6 |
2.2%
|
|
| 1991 | 4 |
1.4%
|
|
| 1992 | 6 |
2.2%
|
|
| 1993 | 7 |
2.5%
|
|
| 1994 | 7 |
2.5%
|
|
| 1995 | 5 |
1.8%
|
|
| 1996 | 5 |
1.8%
|
|
| 1997 | 10 |
3.6%
|
|
| 1998 | 13 |
4.7%
|
|
| 1999 | 14 |
5%
|
|
| 2000 | 19 |
6.8%
|
|
| 2001 | 12 |
4.3%
|
|
| 2002 | 13 |
4.7%
|
|
| 2003 | 15 |
5.4%
|
|
| 2004 | 32 |
11.5%
|
|
| 2005 | 16 |
5.7%
|
|
| 2006 | 22 |
7.9%
|
|
| 2007 | 19 |
6.8%
|
|
| 2008 | 22 |
7.9%
|
|
| APPLICABLE | 6 | ||
| DON'T KNOW | 2 | ||
| MISSING | 3 |
