| Value | Category | Cases | |
|---|---|---|---|
| 0 | 28 |
0.6%
|
|
| 1953 | 1 |
0%
|
|
| 1956 | 3 |
0.1%
|
|
| 1957 | 4 |
0.1%
|
|
| 1958 | 8 |
0.2%
|
|
| 1959 | 7 |
0.1%
|
|
| 1960 | 7 |
0.1%
|
|
| 1961 | 9 |
0.2%
|
|
| 1962 | 11 |
0.2%
|
|
| 1963 | 5 |
0.1%
|
|
| 1964 | 18 |
0.4%
|
|
| 1965 | 7 |
0.1%
|
|
| 1966 | 8 |
0.2%
|
|
| 1967 | 13 |
0.3%
|
|
| 1968 | 18 |
0.4%
|
|
| 1969 | 15 |
0.3%
|
|
| 1970 | 24 |
0.5%
|
|
| 1971 | 22 |
0.4%
|
|
| 1972 | 54 |
1.1%
|
|
| 1973 | 24 |
0.5%
|
|
| 1974 | 39 |
0.8%
|
|
| 1975 | 39 |
0.8%
|
|
| 1976 | 41 |
0.8%
|
|
| 1977 | 44 |
0.9%
|
|
| 1978 | 70 |
1.4%
|
|
| 1979 | 83 |
1.7%
|
|
| 1980 | 95 |
1.9%
|
|
| 1981 | 82 |
1.6%
|
|
| 1982 | 95 |
1.9%
|
|
| 1983 | 93 |
1.9%
|
|
| 1984 | 108 |
2.2%
|
|
| 1985 | 115 |
2.3%
|
|
| 1986 | 99 |
2%
|
|
| 1987 | 98 |
2%
|
|
| 1988 | 88 |
1.8%
|
|
| 1989 | 88 |
1.8%
|
|
| 1990 | 113 |
2.3%
|
|
| 1991 | 111 |
2.2%
|
|
| 1992 | 121 |
2.4%
|
|
| 1993 | 238 |
4.8%
|
|
| 1994 | 236 |
4.7%
|
|
| 1995 | 130 |
2.6%
|
|
| 1996 | 152 |
3%
|
|
| 1997 | 178 |
3.6%
|
|
| 1998 | 191 |
3.8%
|
|
| 1999 | 240 |
4.8%
|
|
| 2000 | 288 |
5.8%
|
|
| 2001 | 284 |
5.7%
|
|
| 2002 | 275 |
5.5%
|
|
| 2003 | 228 |
4.6%
|
|
| 2004 | 343 |
6.9%
|
|
| 2005 | 309 |
6.2%
|