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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1846 | 1 |
| 1847 | 1 |
| 1943 | 1 |
| 1946 | 2 |
| 1947 | 4 |
| 1949 | 2 |
| 1950 | 3 |
| 1951 | 8 |
| 1952 | 4 |
| 1953 | 6 |
| 1954 | 6 |
| 1955 | 5 |
| 1956 | 3 |
| 1957 | 6 |
| 1958 | 13 |
| 1959 | 6 |
| 1960 | 4 |
| 1961 | 1 |
| 1962 | 2 |
| 1963 | 2 |
| 1964 | 3 |
| 1965 | 3 |
| 1966 | 3 |
| 1967 | 6 |
| 1968 | 3 |
| 1969 | 4 |
| 1970 | 2 |
| 1971 | 1 |
| 1972 | 2 |
| 1973 | 2 |
| 1975 | 2 |
| 1976 | 2 |
| 1977 | 2 |
| 1978 | 2 |
| 1979 | 1 |
| 1980 | 1 |
| 1981 | 1 |
| 1982 | 3 |
| 1983 | 1 |
| 2001 | 1 |
| 2004 | 1 |
| 2007 | 1 |
| 2015 | 3 |
| 2016 | 2 |
| 2018 | 1 |
| 2020 | 3 |
| 2022 | 1 |
| 2023 | 1 |
| 2024 | 1 |