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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1952 | 2 |
| 1953 | 3 |
| 1954 | 3 |
| 1955 | 4 |
| 1957 | 1 |
| 1958 | 1 |
| 1961 | 1 |
| 1963 | 1 |
| 1964 | 2 |
| 1967 | 1 |
| 1969 | 3 |
| 1970 | 1 |
| 1971 | 5 |
| 1972 | 1 |
| 1973 | 4 |
| 1974 | 3 |
| 1975 | 1 |
| 1976 | 4 |
| 1977 | 1 |
| 1978 | 4 |
| 1979 | 2 |
| 1980 | 3 |
| 1981 | 3 |
| 1982 | 1 |
| 1983 | 3 |
| 1985 | 2 |
| 1988 | 2 |
| 1991 | 1 |
| 1993 | 1 |
| 1994 | 2 |
| 1996 | 1 |
| 1999 | 1 |
| 2007 | 1 |
| 2008 | 1 |
| 2013 | 1 |
| 2017 | 2 |
| 2018 | 2 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 1 |