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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1948 | 1 |
| 1949 | 1 |
| 1951 | 1 |
| 1959 | 1 |
| 1961 | 1 |
| 1964 | 3 |
| 1965 | 5 |
| 1966 | 15 |
| 1967 | 2 |
| 1968 | 6 |
| 1969 | 8 |
| 1970 | 1 |
| 1971 | 3 |
| 1972 | 6 |
| 1973 | 2 |
| 1974 | 4 |
| 1975 | 1 |
| 1976 | 2 |
| 1977 | 3 |
| 1978 | 2 |
| 1980 | 1 |
| 1982 | 1 |
| 1984 | 3 |
| 1987 | 1 |
| 1988 | 1 |
| 1989 | 1 |
| 1993 | 1 |
| 1994 | 1 |
| 1998 | 1 |
| 2000 | 1 |
| 2002 | 1 |
| 2004 | 2 |
| 2006 | 1 |
| 2007 | 2 |
| 2008 | 1 |
| 2010 | 1 |
| 2011 | 2 |
| 2016 | 1 |
| 2017 | 1 |
| 2020 | 1 |
| 2023 | 0 |